SD Card dismounting constantly - AT&T LG Optimus G

So I am having a problem where my Sandisk 32GB MicroSD card is getting dismounted from the phone. It gives me an error message like "SD card has been removed. Please use the Safely Eject SD card option to prevent data loss" or something like that. Then, it finds the card and runs the media scan, which renders my card useless for that time period. The screen also turns on for a minute or so during this time. Then it stays mounted for maybe up until 5 minutes before starting over again.
This absolutely rapes my battery, taking it from a full charge to dead battery in less than two hours. I thought maybe the SD card was going bad even though it's fairly new, so I took it out and tried it on my old Motorola smartphone, and it works fine and never dismounts. So I thought perhaps it's something with my phone, so I tried an older 8GB micro SD, and it works fine without dismounting at all.
Some info. Phone is running stock 4.0.4 with root and unlocked bootloader. The 32GB SD card worked fine for maybe 3 months until this problem suddenly started. Any ideas?

acidtreat101 said:
So I am having a problem where my Sandisk 32GB MicroSD card is getting dismounted from the phone. It gives me an error message like "SD card has been removed. Please use the Safely Eject SD card option to prevent data loss" or something like that. Then, it finds the card and runs the media scan, which renders my card useless for that time period. The screen also turns on for a minute or so during this time. Then it stays mounted for maybe up until 5 minutes before starting over again.
This absolutely rapes my battery, taking it from a full charge to dead battery in less than two hours. I thought maybe the SD card was going bad even though it's fairly new, so I took it out and tried it on my old Motorola smartphone, and it works fine and never dismounts. So I thought perhaps it's something with my phone, so I tried an older 8GB micro SD, and it works fine without dismounting at all.
Some info. Phone is running stock 4.0.4 with root and unlocked bootloader. The 32GB SD card worked fine for maybe 3 months until this problem suddenly started. Any ideas?
Click to expand...
Click to collapse
It's behaving like mine did when the SD card croaked. 32GB SanDisk here as well...first SD card I've ever had die on me. I was able to get it to read, one time, on my TF101 to rescue my photos...now it won't read anywhere. I'm not sure what to tell you, except that I'd back that card up pronto, just in case...

dandrumheller said:
It's behaving like mine did when the SD card croaked. 32GB SanDisk here as well...first SD card I've ever had die on me. I was able to get it to read, one time, on my TF101 to rescue my photos...now it won't read anywhere. I'm not sure what to tell you, except that I'd back that card up pronto, just in case...
Click to expand...
Click to collapse
Yeah, it was a somewhat common issue for a few of us about 4 months ago. I know blenkows and I both had it happening a lot. For me it eventually went away, not sure what the deal was, there.
Sent from my LG-E970 using xda app-developers app

Jank4AU said:
Yeah, it was a somewhat common issue for a few of us about 4 months ago. I know blenkows and I both had it happening a lot. For me it eventually went away, not sure what the deal was, there.
Sent from my LG-E970 using xda app-developers app
Click to expand...
Click to collapse
This
My SD card wouldn't stop doing it. I just gave with it. Uploaded all my music to Google Play, put the 16 GB card that the phone came with in there. All is well now. Haven't had a problem with the card in there yet but I rarely use it now anyways. Basically just there for backups
____
Sent from my LG Original Gangsta

Your card is defective.
Sent from my Optimus G using xda premium

Well thanks for the responses, I already backed up the data that was on there. I can't find my receipt for it...any idea if Sandisk is good about replaced defective cards?

I went through four RMA replacement 64gb class 10 SanDisk cards, ate the $90 loss and spent $80 on the Samsung equivalent. It's faster and I have had zero problems with it. However, I used SanDisk cards for nearly a decade before those without any problems.
The SanDisk hi capacity cards seem to not work well in the lgog. They worked fine in my card readers, just not the lgog slot.
Sent from my Optimus G using xda premium

I also had this problem with a 32gb sandisk. I RMA'd it and it happens less frequently for the new one. I'd say it happens once every few weeks now instead.

It's your card. I haven't experienced this at all n I'm using a no name class 10 32gb card. I was looking scandisk card but luckily I read the reviews n they where all negative
Sent from my LG-E970 using Tapatalk 4 Beta

Related

[Q] External sd card corrupted....twice.

Let me start out by saying that I have searched for any threads that have covered this, and have come up empty.
This has happened twice to me in the last two months. Running task650's V.9, which is an awesome ROM. I've got a Lexar Class 10 32gb card. Twice in two months have I booted up and the media scanner would show a broken sd card notice. I tried booting the phone without the card, and then re-installed the card. Same notice of bad sd card on boot.
At this point I took the card and stuck it in a laptop, which generated a "can not open due to corrupt or unreadable file" and "reformat drive" or something like that. I was forced to format, losing photos, vids, and TiBu folder. I synced to Dropbox and got the backup folder re-installed.
Any ideas about what could have corrupted the card? I suppose the card could be damaged. I paid good bucks, as it is not a low end card. Replace the card? Any guidance would be appreciated.
I have a Lexar Class 10 32GB card. Same issue, after first time reformatted and same thing happened a week or two later.
I did an RMA with Lexar, think there is a 1 year warranty. Got a new card, been working fine the past several months.
Ok. Thanks for the input. I've got a Kingston Class 10 on the way.
I was hoping it wasn't in the phone hardware.
Thanks, I just reminded myself to do a backup of that card itself to my PC.
Sorry to hear about your problem though.
L
LiLChris06 said:
Thanks, I just reminded myself to do a backup of that card itself to my PC.
Sorry to hear about your problem though.
Click to expand...
Click to collapse
Looks like I will be starting practice myself
Sent from my SAMSUNG-SGH-I777 using xda premium
This just happened to me two days ago. Lost some pics that was about it. Pissed me off because they were of my son and you'll never get those moment back but too late now. Always backup!!
Sent from my SGH-I777 using XDA App
Skyler2Dope said:
This just happened to me two days ago. Lost some pics that was about it. Pissed me off because they were of my son and you'll never get those moment back but too late now. Always backup!!
Sent from my SGH-I777 using XDA App
Click to expand...
Click to collapse
Yeah, I lost some New Years day photos and vids with my wife. I'll NEVER find her in that good of a mood again!
It makes me wonder about my decision to place my TiBu folder on the external card, along with Nandroid backups. True, it syncs to Drop Box for TiBu but do I need the extra headache of wondering if my card is going to get smoked again? I suppose I should be backing it all up to pc..
I'm not sure but it seems to be a problem with the phone and class 10 cards.
My first one was a 16gb class 10 micro sd that one day just decided to stop working (lasted a month or so). Couldn't access it via the phone or PC.
So I went out and got a 32gb class 10 and after a month or so again it stopped working
Knowing this I refused to buy a class 10 card again. I went to Walmart and got the cheapest 32gb micro sd (Sandisk class 4) and so far so good. no problems at all
Lost everything I had too on the first 2 cards so learned the hard way to do backups to my PC.
Not the class, it's probably the brand. Some brands have terrible quality control, especially if you go for a cheaper one. I have one from Amazon Basic and it works just fine. My brother uses one from SanDisk with zero problem.
Class 10 is also newer. The technology to manufacture these is not that old. I suspect some manufacturers still need to refine their process.
Sent from my Galaxy SII
me too
Posted this on similar thread here, but want to make sure people know it's a problem:
Got a similar problem here.
Transcend Class 10 32GB Card
Works in PC, HTC Desire - no probs.
Put in Galaxy S2, it starts Media Scanning, a few seconds later reports SD Card Damaged, requires formatting.
It's right - take it back out (again, umpteenth time!), put it in PC or HTC - card is "damaged". (Nothing permanent, can reformat.)
Samsung support claim to not know anything - mind you they "play dumb" about the camera "pink spot" issue, until you challenge them to get real...
Oh, dear!
Brian
---------- Post added at 12:31 PM ---------- Previous post was at 11:51 AM ----------
I thought my Galaxy was shagging the Card - but it could be a Fake
Testing now with H2testw (also visual clues available) see
YouTube video watch?v=ePdITNObDYE
Hope this helps
Brian
Buy a 500gb external hard drive for like 50 bucks they're cheap now. Backup everything to it once a week. Never lose data. Profit.
Sent from my SGH-I777 using Tapatalk 2
Sounds like a brand issue, but have you ever tried checking the drive for errors?
Given that even your PC gives you a "damaged" message, it may not work. Once inserted, go to "My Computer," get to properties, and check for errors (enable the "automatically fix file system errors" option). In the past, this has corrected "corrupted" SD cards for me.
geomax45 said:
Let me start out by saying that I have searched for any threads that have covered this, and have come up empty.
This has happened twice to me in the last two months. Running task650's V.9, which is an awesome ROM. I've got a Lexar Class 10 32gb card. Twice in two months have I booted up and the media scanner would show a broken sd card notice. I tried booting the phone without the card, and then re-installed the card. Same notice of bad sd card on boot.
At this point I took the card and stuck it in a laptop, which generated a "can not open due to corrupt or unreadable file" and "reformat drive" or something like that. I was forced to format, losing photos, vids, and TiBu folder. I synced to Dropbox and got the backup folder re-installed.
Any ideas about what could have corrupted the card? I suppose the card could be damaged. I paid good bucks, as it is not a low end card. Replace the card? Any guidance would be appreciated.
Click to expand...
Click to collapse
The only corruptions I have experienced on this phone were when using MTP to transfer files from the PC. Since I stopped using MTP and use only USB Storage mounting, I have not had any more problems.
I've actually experienced this twice. Both times flashing to AOKP. I'm not blaming AOKP but just saying. The first time even my PC wouldn't read it and it needed to be reformatted. The second time my pc could read it and after nandroiding back to shostock2 it was fine.
Sent from my SGH-I777 using xda premium

"SD Card Unexpectedly Removed" hardware issue solved

Hey all,
I thought I would share my findings to help others with the same issue.
Two days ago I kept catching glimpses of a card image in the notifications at the top of the screen, but it would only be for a second so I could not see what it was trying to tell me. But had a quick look and sd card seemed fine and all data was present on handset. A couple of hours later it popped up with "SD Card Unexpectedly Removed". I tried ejecting and reinserting,restarting device and turning off and removing battery all to no avail. So I did a quick search which showed this seemed to be quite a common issue, after reading many threads with people saying the sd card is corrupt or network providers saying it was software and to do a restore. I decided before all that hassle I would open the phone and check the circuitboard expecting it to be a dry solder joint. One thing I will point out that was different to some other users is the fact my sd card was not visible with the phone connected to the computer, so this may not solve all related issues.
THE FIX
Turn off phone, remove the battery, SIM card and sd card. Remove all screws except the one by the 3.5mm jack. Gently pull the white plastic trim that surrounds the card holders and battery but the top part with speaker and camera does not need removing. Once removed if you look to the left of the sd card holder you will see the ribbon that connects the sd card to the main circuit board and at the end of the ribbon is the connector. Mine was disconnected and was loose, even if yours is not loose it would be worth gently pulling it off and reconnecting it. Then reassemble in the reverse order.
This was a nice surprise in the sense it was a very simple fix. However when I mounted the sd card even directly in my pc it was not found, I assume that the loose connector floating about had probably shorted its connections and caused an issue with the sd card. After a handfuls of attempts at mounting it in my pc it was finally detected and I backed up all the data and reformatted the sd card, then copied the data back,mounted it in my phone and was happy to find it all working as expected.
I hope this information will help some of you out, as it was a simple fix to a simple issue and results from searching had no solutions, just lots of assumptions.
And what can I do
Hi
I read your articles and seem very good but u have a question.
I had the same issue and I saw that every time my phone said I hat message it creates in my sd card a folder named lost. I and then i saw that one part of my battery was going there, ti reconnect the phone with my sd card
I formatted my sd card and did all the things that I found in the Internetbut nnothing works and I just change my sd for another one I had and sincethere u ddon't have any other issue, but my computer detects very good my first sd card and I'm not sure how to fix it.
Any idea?
Regards
Recently ive just faced this issue, what I did is to insert my 32gb sd card in my PC and run CHKDISK, havent got any error while performing this, thereafter i inserted it in my phone & goodness till now this sd card error hasn't appear yet. (finger crossed).
Mine did something like this a few times and then the 32GB Sandisk class 10 card died. Couldn't get it to work in any device except Linux based Media player. Luckily managed to copy my nadroid backup and TB backup. Sent to Sandisk and they replaced it. There is already a thread about S3 damaging teh SD cards. May be the loose connection is what's causing the card to to end up dead.
sak500 said:
Mine did something like this a few times and then the 32GB Sandisk class 10 card died. Couldn't get it to work in any device except Linux based Media player. Luckily managed to copy my nadroid backup and TB backup. Sent to Sandisk and they replaced it. There is already a thread about S3 damaging teh SD cards. May be the loose connection is what's causing the card to to end up dead.
Click to expand...
Click to collapse
Yeah,as mentioned I have seen a lot of issues about sd cards, this is the first issue I have had and thought it would be worth mentioning. There is little space when the case is together so it could easily still make contact and seem fine even if the connector has worked loose and cause all kinds of issues. As mentioned mine had the sd icon popping up every now and then before it actually failed. Some users seem to be going through a lot of sd cards with them failing on a regular bassis.
I've been using my 32gb card since my last phone which was the LG Optimus 3D it is a scandisk class 10 one. Anyway i took it out of the 3D and stuck it into my S3 i still have not had a problem. I did take it out a few times to put a rom in because i wiped my phone and didn't have a rom in the Sd card. Also i dropped my phone and replaced the whole front silver bumper bit the whole digitizer because i dropped my phone while playing basketball. It still works. It has been a year now it has been in two phones and still works great. I must be lucky..
I got mugged for the SD though i bought it last year for £60 from Argos a store in the UK. Now you can get them for half the price oh well.. I am waiting for the 128gb ones to come out so going to buy one lol..
today also my Sandisk Ultra HC I 32GB it's died, tomorrow I'll test with pc but no sign of life :crying: WTF samsung !!!
hey i have the same issue with an 32gb sd card, it was workking great and then i was getting the error about
"SD Card Unexpectedly Removed" and then i tried everything i could and my computer detect the sd card and it seems to be working normal but in my phone i have the error over and over again and it was draining my battery too, and the only thing i did was change to another 16gb sd card and this one is working.
maybe there is a problem with the 32gb sd cards
I have a 16GB Sandisk UHS-1 card and i have been getting this issue as well, and its becoming more and more frequent. Whenver it happens, the ringtones/notifications for certain apps like Gmail and Message get reset as the ringtones i set were stored in the sdcard. Also the photo frame app i have on my homescreen often resets to nothing as the pictures were also stored in the sdcard. Its really annoying because I can leave my phone sleeping, only to wake it up realizing my ringtones are all set to silent and my photo frame has been reset. At least i know its a common problem. damn you samsung!
Has anyone actually tried checking the connection on the ribbon as suggested? Mine has been fine since and works fine.
Does this method void our warranty? Seems so.
Sent from my GT-I9300 using xda app-developers app
SlimJ87D said:
Does this method void our warranty? Seems so.
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
There is no way anyone would know you have opened it, the screws are all Philips instead of t6. As long as you use the correct screwdriver it won't damage the heads and will leave no sign of entery and it takes around 10 mins to complete. Or you could take it to Samsung to do but seems a lot of hassle for such a simple fix.
Also most people are rooted without concern of the warranty.
So there's no seals or stickers that are broken?
Sent from my GT-I9300 using xda app-developers app
SlimJ87D said:
So there's no seals or stickers that are broken?
Sent from my GT-I9300 using xda app-developers app
Click to expand...
Click to collapse
Nope, no sticker or seals and just so you know all screws to remove the back are identical, there are only two screws inside which are different but do not need removing for this. You only need a Philips screwdriver ( I used a ph00 x 40) as long as the screwdriver fits the screw well it will not damage the head. Once screws are out a flat head screwdriver or similar are helpfull to prise the back off.
Hi Guys,
A little feedback from my experience with this.
I too was experiencing the "Unexpectedly Removed" error on my 32GB Class10 Sandisk.
It was playing havok with my setup because I use a 8GB Ext4 Partition on the card, where I move 90% of my apps. (About 6GB of that is used by games + their "external" data), and it keeps my phone and FAT32 partition free for important stuff. (I use Link2SD and DirectoryBind)
The problem is, after the device wakes, Link2SD can't find any of the apps, so I can't start any of them, and I have to do a full reboot to get them back. :/
So, after searching and searching, I couldnt find a valid solution.
I tried with a 16GB class10 Samsung, and a 32GB Class10 Samsung card. Exact same setup. NO ISSUES.
Everything works perfectly.
Then I found this thread:
http://forum.xda-developers.com/showthread.php?t=1933743&page=2
Where most of them are experiencing this error with Sandisk cards.
Apparently, it's a known issue with Sandisk Cards (especially the 32GB models), and cards sold after December 2012 no longer experience this.
I have contacted Amazon.co.uk about replacing the card as it's only 2 months old, still waiting for their answer. Will update if anyones interested.
cheers
tryerxda said:
Hi Guys,
A little feedback from my experience with this.
I too was experiencing the "Unexpectedly Removed" error on my 32GB Class10 Sandisk.
It was playing havok with my setup because I use a 8GB Ext4 Partition on the card, where I move 90% of my apps. (About 6GB of that is used by games + their "external" data), and it keeps my phone and FAT32 partition free for important stuff. (I use Link2SD and DirectoryBind)
The problem is, after the device wakes, Link2SD can't find any of the apps, so I can't start any of them, and I have to do a full reboot to get them back. :/
So, after searching and searching, I couldnt find a valid solution.
I tried with a 16GB class10 Samsung, and a 32GB Class10 Samsung card. Exact same setup. NO ISSUES.
Everything works perfectly.
Apparently, it's a known issue with Sandisk Cards (especially the 32GB models), and cards sold after December 2012 no longer experience this.
Click to expand...
Click to collapse
A curious question if I may.
Was this a SanDisk Ultra (UHS) card? Most (if not all) Android phones do not have a proper UHS-I driver today and, although the card is supposed to switch down automatically, that transition time can fool the OS sometimes.
---
I am so clever that sometimes I don't understand a single word of what I am saying... (via Tapatalk)
ny_limited said:
A curious question if I may.
Was this a SanDisk Ultra (UHS) card? Most (if not all) Android phones do not have a proper UHS-I driver today
Click to expand...
Click to collapse
I read something about UHS compatibility, so I got an SD-HC
http://www.amazon.co.uk/gp/aw/d/B007JTKLEK/ref=mp_s_a_1?qid=1357264092&sr=8-7&pi=SL75
Is it the same thing?
Hmmm. Ok, might be getting somewhere.
Any idea if these cards have an internal "power saving" system that maybe kicks in if voltage drops below a certain level?
Sent from my GT-I9300 using xda app-developers app
tryerxda said:
I read something about UHS compatibility, so I got an SD-HC
http://www.amazon.co.uk/gp/aw/d/B007JTKLEK/ref=mp_s_a_1?qid=1357264092&sr=8-7&pi=SL75
Is it the same thing?
Hmmm. Ok, might be getting somewhere.
Any idea if these cards have an internal "power saving" system that maybe kicks in if voltage drops below a certain level?
Click to expand...
Click to collapse
Yes, the red and Grey SanDisk cards are UHS.
Yes, they definitely have controllers and the host device can command them (if it knows how). I know that they allow In System Programming (ISP) for updating firmware. They support auto-standby, power-off and sleep modes but am not certain if the card would switch without command. Check the SD link in my signature if you really need more info.
---
I am so clever that sometimes I don't understand a single word of what I am saying... (via Tapatalk)
I tested my SanDisk 64GB Ultra card in a Note 2 and it had the same symptoms (Mine were worse, with the card locking up while playing music after a few minutes, causing mmc timeout errors in the kernel).
I switched to a Samsung 64GB Pro card and since then I haven't had any issue. It's also twice as fast.
The amount of headaches this SanDisk card gave me is insane, probably the last time I buy a card from them.
i have sandisk ultra class 10 32gb. try this setup. use minitool to reformat your card then set it the cluster size to 16kb.
for me so far so good. will test this in a couple of days.

External SD card error

Hi ,
My External SD card on galaxy s3 i9300 international version .... shows up on the notifation bar that Sd card removed unexpectedly.... this happens evry 10 mins or 15 mins....
Help appriciated
Have got the exact same issue and drains the battery quicker as it has to keep on rescanning the SD card...I have reformatted the card and it still doesn't help...did not have this issue until last week and don't know what happened for the SD card to keep on being removed every 10-15mins..I have realized that every time I wake the phone up I see the card icon in the status bar for a second.. Sadly I have read that this is a common issue and it eventually can fry the card and make it useless so I have decided to remove it and not use a SD card(main reason I got the phone was for this reason)...since then my battery has been amazing as the media scanner is not constantly running..so far no one seems to have a reason why this suddenly happens as I have not had an issue since I got the s3 which was over 6 months ago and out of nowhere this issue occured..I hope that this may be an software issue which can be fixed in the future or hopefully someone in xda can either find out whats the issue or find a fix till then I will keep my 32 GB sandisk card safe.
Sent from my Nexus 7 using xda app-developers app
Format card in windows factory reset phone .
jje
Sent from my GT-N8013 using xda premium
I have done .... sadly the issue still the same
Do you use a Sandisk 32GB card by any chance?
I had these same issues, which went away once I changed to samsung cards.
If you can, return the card for replacement, as cards made after december 2012 dont have this issue anymore.
cheers
Interesting, i have exactly the same issue since january 1th. It worked for about a month without any problems (bought it late november).
Now this is killing me how it behaves every 5min. I have reset the phone, updated the phone, formatted the sd-card.. nothing helps.
So if i return my sandisk 32gb, should i ask for a new sandisk or go with the samsung?
tryerxda said:
Do you use a Sandisk 32GB card by any chance?
I had these same issues, which went away once I changed to samsung cards.
If you can, return the card for replacement, as cards made after december 2012 dont have this issue anymore.
cheers
Click to expand...
Click to collapse
Got a 32gb sandisk card which I got in Octoberish I think...was working fine till recently...went back to my old 16gb card and everything is fine again...is this an issue with Samsung s3 or the SD card as the SD card works fine on my sisters RAZR I or is that some cards don't play nice with the s3...
Sent from my Nexus 7 using Tapatalk HD
Happened to me after I dropped mine. Bought a new SD reader from ebay and replaced it myself
Glebun said:
Happened to me after I dropped mine. Bought a new SD reader from ebay and replaced it myself
Click to expand...
Click to collapse
In your case I guess no SD cards would work...with me and many other some SD card worked and some didn't.
Sent from my Nexus 7 using Tapatalk HD
Had the same issue with my S3.
Turned out that the SD card was dying, this caused it to be unmounted by itself and then mounted again (sometimes showing notification “sd card removed unexpectedly”), hence triggering the media scanning process.
I created an application to monitor how many times the SD card was removed, and turned out to be unmounted every ~3 mins!!!
I then bought a new Transcend 32GB Class 10 card, and until now, this never happens, no reports from the application whatsoever, and no media process eating my battery.
I just published this app in the play store now, this is the link:
https://play.google.com/store/apps/details?id=com.sdcardmonitor
hamidoo said:
Had the same issue with my S3.
Turned out that the SD card was dying, this caused it to be unmounted by itself and then mounted again (sometimes showing notification “sd card removed unexpectedly”), hence triggering the media scanning process.
I created an application to monitor how many times the SD card was removed, and turned out to be unmounted every ~3 mins!!!
I then bought a new Transcend 32GB Class 10 card, and until now, this never happens, no reports from the application whatsoever, and no media process eating my battery.
I just published this app in the play store now, this is the link:
https://play.google.com/store/apps/details?id=com.sdcardmonitor
Click to expand...
Click to collapse
I've seen my 64Gb Sandisk card auto unmount and remount itself a couple of times today, have seen it once before. Again was caining the battery on the phone with the media process rescanning it.
Thanks for the app I've installed it to monitor this from now on, to see if its potentially a faulty card.
hamidoo said:
Had the same issue with my S3.
Turned out that the SD card was dying, this caused it to be unmounted by itself and then mounted again (sometimes showing notification “sd card removed unexpectedly”), hence triggering the media scanning process.
I created an application to monitor how many times the SD card was removed, and turned out to be unmounted every ~3 mins!!!
I then bought a new Transcend 32GB Class 10 card, and until now, this never happens, no reports from the application whatsoever, and no media process eating my battery.
I just published this app in the play store now, this is the link:
https://play.google.com/store/apps/details?id=com.sdcardmonitor
Click to expand...
Click to collapse
This app is really great, proves the issue. Like others, I have this problem with a Sandisk Ultra 32gb. I tried popping in an old 4gb card (forget the manufacturer) and had no issues.
Saw somebody else suggesting that the Franco kernel fixed this issue, and sure enough it seemed to have cured it for me for a few weeks, but it's just started again today - your app showed unmounts/ejects happening every couple of minutes, so I've now submitted a request to Sandisk to return the card.

[Q] 64GB Micro SD card issues

Ok, after buying a cheap and corrupted 64gb micro sd card, I went and spent the money on a 64gb sandisk card. It works just fine. Now, I am rooted and have synergy rom build 104 which is also running fine. I noticed before I flashed the rom that cwm wouldn't recognize my external sd card. I read up on that and found that cwm won't read cards formatted to exfat. So, I formatted the card to fat32 and remounted, transferred all my music back onto the card. Everything worked just fine until I plugged my phone into my computer. I was able to open and navigate through the files like normal, except when I went to open the music folder where all my mp3s were. I tried this on 2 different computers and on both the computer froze with the sand timer. The phone itself was fine, my music player(poweramp) was and is able to play the files with no issue. Also, when I unmounted the card and put it into a card reader and then connected the card reader to my computer and voila! Everything was fine, I was able to open the music folder and scan through the music files. I am not sure what the issue is. Can anyone shed some light as to whether this is a phone/rom issue, a micro sd card issue, an mp3 issue? Any ideas would be appreciated.
That sounds like a bad sd card. Have you ran a checkdisk on it?
Sent from my SCH-I545 using Tapatalk 4 Beta
If it's a SanDisk 64GB MicroSDXC UHS-1 then they have a replacement program where the older cards had issues in the S3/S4 devices. They sent me a free replacement and everything seems to be working. No Damaged card errors as of yet.
DarkMenace said:
If it's a SanDisk 64GB MicroSDXC UHS-1 then they have a replacement program where the older cards had issues in the S3/S4 devices. They sent me a free replacement and everything seems to be working. No Damaged card errors as of yet.
Click to expand...
Click to collapse
Hm, been searching around for this exact issue. Coworkers S4 with this exact SD card has been getting the removed unexpectedly error. Reformatted a few times, restarted phone, error comes back. It's in my Note 2 at the moment for troubleshooting, and so far so good, but this makes me move more toward an actual SD card issue in combination with the s4, and not the phone itself.
h1p1n3 said:
Hm, been searching around for this exact issue. Coworkers S4 with this exact SD card has been getting the removed unexpectedly error. Reformatted a few times, restarted phone, error comes back. It's in my Note 2 at the moment for troubleshooting, and so far so good, but this makes me move more toward an actual SD card issue in combination with the s4, and not the phone itself.
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The SanDisk issue only affects the Galaxy S3/S4 as they told me. My other 64gb Sandisk card works just fine in my tablet.
DarkMenace said:
If it's a SanDisk 64GB MicroSDXC UHS-1 then they have a replacement program where the older cards had issues in the S3/S4 devices. They sent me a free replacement and everything seems to be working. No Damaged card errors as of yet.
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I called them and they are going to exchange it out for me. The weird thing is that I didn't get any damaged card error messages on the phone itself. It mounted it as soon as I popped it in. Even after formatting to fat32, it mounted right away with no issues. It only happened a couple days after I transferred all my music onto it. Is the free replacement they give you a newer card or newer model number?
+1 to the above. SanDisk told me they have a new version of the 64gig card with updated firmware, specifically for the S4. Package tracking shows mine is to be delivered on Monday.
tylerdurden531 said:
I called them and they are going to exchange it out for me. The weird thing is that I didn't get any damaged card error messages on the phone itself. It mounted it as soon as I popped it in. Even after formatting to fat32, it mounted right away with no issues. It only happened a couple days after I transferred all my music onto it. Is the free replacement they give you a newer card or newer model number?
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It's the newer models. With the updated Firmware.
stuartv said:
+1 to the above. SanDisk told me they have a new version of the 64gig card with updated firmware, specifically for the S4. Package tracking shows mine is to be delivered on Monday.
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Yeah, the guy said they were having stock issues and said it would take 3 weeks for mine to ship. Oh well, at least they are exchanging it. Thanks for the help guys!
Sent from my SCH-I545 using xda app-developers app
So are all 64GB cards having issues, like other brands? I want a 64 bc my backups are freaking huge and taking up space. And with being rooted how would I transfer everything to the new card without messing up the phone?
Sent from my SCH-I545 using Tapatalk 2
stuartv said:
+1 to the above. SanDisk told me they have a new version of the 64gig card with updated firmware, specifically for the S4. Package tracking shows mine is to be delivered on Monday.
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So when this card tanks, I have to drop the big money on a card specifically made for this phone. Is this a problem with existing cards or did Samsung do something that required this firmware change?
tylerdurden531 said:
Yeah, the guy said they were having stock issues and said it would take 3 weeks for mine to ship. Oh well, at least they are exchanging it. Thanks for the help guys!
Sent from my SCH-I545 using xda app-developers app
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They told me that too. My guess is it's due to the mass recall of the chips for the S3/S4. They said it's not present in Tablets so my 64GB in my tablet would be fine.
+1 problem with Sandisk 64Gb UH-1 card. Unexpected removal error. I am writing just for statistics. Just got my new Verizon S4 - and have problems...
FYI - I'm having a similar issue with a Samsung 64GD card. Got it to see the music for a while yesterday but after a reboot it can no longer see it.
Update, I received my new card and just popped it in. My phone automatically formatted it to exFAT. I'm not going to try changing it to FAT32, but is there any version or way I can get cwm to recognize the card in exFAT format? I tried TWRP, but when I flashed a rom it soft bricked the phone so I would like to stick with cwm.

Importance of high Internal storage, 2 sd cards that failed

I have the 16 gb s4 and its great an all that we have a micro sd slot but I have found the whole concept unreliable at best. For one I have had 2 different sd cards fail. One gskill 32gb class 10 and a samsung 64 gb fail. All my pictures, roms and app gone. I back them up but still not being able to trust them is a huge concern. And the 64 gb seemed like a great idea except you have to format it fat32 to get recovery to view it, and when I did that my phone constantly wanted to format it back exfat. I pretty much have no option to get a 32 gig with a mdk rom either. Just my rant as I figure out how to rma both of these cards.
Sent from my SCH-I545 using xda premium
Sounds like you've just had some bad luck. I've been using a 64gb Class 10 SanDisk formatted for exFat and it's worked fine so far (I even use Folder Mount to move a bunch of stuff from internal to external).
Surprised the Samsung card failed on you.
Btw, the exfat/64gb issue only exits for some implementations. I'm running Barebones ME7 rom w/ktoonsez kernel and Phils/CWM recovery and both the recovery and the kernel support 64gb exFat.
Sent from my SCH-I545 using xda premium
Jayracer7474 said:
I have the 16 gb s4 and its great an all that we have a micro sd slot but I have found the whole concept unreliable at best. For one I have had 2 different sd cards fail. One gskill 32gb class 10 and a samsung 64 gb fail. All my pictures, roms and app gone. I back them up but still not being able to trust them is a huge concern. And the 64 gb seemed like a great idea except you have to format it fat32 to get recovery to view it, and when I did that my phone constantly wanted to format it back exfat. I pretty much have no option to get a 32 gig with a mdk rom either. Just my rant as I figure out how to rma both of these cards.
Sent from my SCH-I545 using xda premium
Click to expand...
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you might be just out of luck
I'm using a sanDisk Ultra 64GB on my S4 and everything works fine (FAT32 formatted)
I've never had any SD card fail me. Never heard of gskill and there is the possibility that the samsung sd card you got was a fake...depending on where you got it. I've used PNY, Samsung, and SanDisk sd cards and all have lasted me a long time through heavy usage.
I have a 64 gig sd card and never had an issue. I use it all the time.
first thing I did was wipe and format it in twrp recovery to whatever format it wanted.
golden.
Two cards failing? Unbelievable bad luck (I have never had a storage device of any type fail...not even platter hard drives...and I'm 43 and have had my own pc of some sort for 25 years), a bad card reader in the phone, or operator error.
I'm thinking bad card reader in the phone.
Sent from my GT-I9505G using xda premium
I've had a couple cards go bad. It happens. Learned to do periodical back ups.
Sent from my Galaxy S4 using tapatalk
During last week of owning my S3, i took my samsung 32gb microsd out when i replaced my screen , upon getting it all finished and putting it back in, the sd was dead. I feel you on that though, sucks to loose all the pictures. Wouldnt get recognized on either of my pcs, Old 8mp digital cam tried to format it but couldnt do it.
I bought an authentic sandisk 32gb microsd to replace it, so far so good.
brizey said:
Two cards failing? Unbelievable bad luck (I have never had a storage device of any type fail...not even platter hard drives...and I'm 43 and have had my own pc of some sort for 25 years), a bad card reader in the phone, or operator error.
I'm thinking bad card reader in the phone.
Sent from my GT-I9505G using xda premium
Click to expand...
Click to collapse
You need to go buy a lottery ticket, hdd/ssd/ram are the number one thin besides power supplies that die in computers. I have had probably a 10 percent failure amomg desktop ssd's since they first got popular. I build alot of computers and its definitely a brand/product line importance. Even the good guys come out with bad products time to time.
Sent from my SCH-I545 using xda premium
Jayracer7474 said:
You need to go buy a lottery ticket, hdd/ssd/ram are the number one thin besides power supplies that die in computers. I have had probably a 10 percent failure amomg desktop ssd's since they first got popular. I build alot of computers and its definitely a brand/product line importance. Even the good guys come out with bad products time to time.
Sent from my SCH-I545 using xda premium
Click to expand...
Click to collapse
I know it's crazy. My mom plays freecell on an old pc that I bought in 1999...and it's still on its original hard drive...and still boots an xp install I made in about 2005.
I've never had ram die either. Only power supplies and monitors.
Sent from my GT-I9505G using xda premium
I had an almost identical issue a while back. I used to always use a Sandisk 32gb class 10 card in my S3 and other devices. I used the same card for 3 or 4 years. When I got my S4 I decided to make the jump to a 64 gb card due to the small internal storage. So I went out and bought a 64 gb Class 10 Sandisk since I have always had good experiences with their cards. First thing I popped it into my computer and re-formatted it to Fat32. Then I plugged it into my phone and it seemed to work fine for a while, then randomly it would unmount itself and remount for no apparent reason. It would do it randomly 3 or 4 times a day. I tried wiping and reformatting to fat32 again, tried exfat, and even NTFS. Failing all that I took it back and exchanged it for another identical one. Same EXACT issue... So I gave it one last shot and exchanged one more time. At this point the ladies at Wal-mart are looking at me sideways like I'm running a scam or something. Lol. Anyways, the third one worked spectatularly. I haven't had one single unmount with it and I have all the storage I could possible need. I keep two Nandroid backups on my memory at all times (and with the S4 they are HUGE, 4gbs or better) and I have like 15 gbs of music, not to mention other miscellaneous files and apks and such, and I still have 30 gbs left.
I say just try it again man. Third times a charm. And I personally would always recommend Sandisk. I have never had one fail me and lost my data or anything. They have always worked for me.
nicholi2789 said:
I had an almost identical issue a while back. I used to always use a Sandisk 32gb class 10 card in my S3 and other devices. I used the same card for 3 or 4 years. When I got my S4 I decided to make the jump to a 64 gb card due to the small internal storage. So I went out and bought a 64 gb Class 10 Sandisk since I have always had good experiences with their cards. First thing I popped it into my computer and re-formatted it to Fat32. Then I plugged it into my phone and it seemed to work fine for a while, then randomly it would unmount itself and remount for no apparent reason. It would do it randomly 3 or 4 times a day. I tried wiping and reformatting to fat32 again, tried exfat, and even NTFS. Failing all that I took it back and exchanged it for another identical one. Same EXACT issue... So I gave it one last shot and exchanged one more time. At this point the ladies at Wal-mart are looking at me sideways like I'm running a scam or something. Lol. Anyways, the third one worked spectatularly. I haven't had one single unmount with it and I have all the storage I could possible need. I keep two Nandroid backups on my memory at all times (and with the S4 they are HUGE, 4gbs or better) and I have like 15 gbs of music, not to mention other miscellaneous files and apks and such, and I still have 30 gbs left.
I say just try it again man. Third times a charm. And I personally would always recommend Sandisk. I have never had one fail me and lost my data or anything. They have always worked for me.
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Did you format back to Fat32 on your third try? I am going through the same thing and I am on my second card, waiting for the third to come in the mail. The first one I did Fat32 and out of the blue it would get extremely hot, and then say safe to remove card without me doing anything.
The second one, I left as is, copied everything over and left it exFat. That lasted about a week and then stuff started disappearing in gallery view, BUT it was there in Root explorer. The card it a Sandisk 64 gb Mobile Ultra.
kaos2569 said:
Did you format back to Fat32 on your third try? I am going through the same thing and I am on my second card, waiting for the third to come in the mail. The first one I did Fat32 and out of the blue it would get extremely hot, and then say safe to remove card without me doing anything.
The second one, I left as is, copied everything over and left it exFat. That lasted about a week and then stuff started disappearing in gallery view, BUT it was there in Root explorer. The card it a Sandisk 64 gb Mobile Ultra.
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Click to collapse
Yeah mine was the same issue, only I didn't notice any heat to speak of. And yes on the first card I got, I used a windows program called fat32format and formatted it before ever even putting it in my phone. It would intermittently unmount and remount exactly as you are describing. So I took it out, wiped and reformatted to fat32 again. Still did the same thing. So as a last ditch I tried formatting to exfat. My phone and recovery both read the card just fine, it would just unmount randomly, or when I was either listening to music or viewing my gallery (something that required high read speeds) and it would unmount and interrupt it. So, thinkiing that it was just a faulty card I exchanged for a identical new one. Same issue. This time I used a different program to reformat to fat32, I forget the name of it, but it was a command line based reformatting tool for windows. I used it and had that same problem even after several reformats. At this point I was starting to wonder if it was a problem with my phone's SD card slot., So as a last effort I did one more exhange, reformatted using the command line tool and haven't had one single unmount since then, and I have ALOT of stuff on it. I would just suggest keep trying. I think that Galaxy phones are just sensitive to card reading and if you don't have an absolutely perfect one it will have problems. Or who knows, maybe I just had that off chance of one in a million by getting two bad cards in a row. Either way, I would suggest reading this thread (if you haven't already): http://forum.xda-developers.com/showthread.php?t=1773735
Use the first method on your new card. That I think is the most foolproof formatting method. Good luck, you will find the right card eventually.
Thank you!! Ill give it a shot tomorrow when the new card arrives. I appreciate that thread reference too! Fingers are crossed.
kaos2569 said:
Thank you!! Ill give it a shot tomorrow when the new card arrives. I appreciate that thread reference too! Fingers are crossed.
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Click to collapse
Yeah no problem. Good luck
There may be a pattern....
But I am not sure exactly what it is.
I have two nearly identical SG4s (1 for + 1 for my wife) and both have the 64GB SanDisk Micro Ultra. One phone is completely stock (my wife's) and the card is lightly used and formatted exFat. Mine is rooted and Roomed (Synergy) with TiBkup and CWM. Like other folks, I had to reformat the card to Fat32 in order to work with CWM.
As far as I can tell, she never sees any un-mount/re-mount messages on her phone but it is lightly used and she might not notice. I DO see occasional un-mount/re-mount messages, but I cannot tie it to a specific program or event. Sometimes happens right after reboot. Sometimes happens when I launch TiBkup. But goes for days with no issues.
I have never lost any data or noticed any performance hits, but now I am worried that I might.
Guess it is time to take more backups of the backups...
I have had lots of computer equipment fail over the years, but never exactly like this...
Well I followed everything nicholi2789 suggested and low and behold my card is actually working good. It does not get hot when reading ( not as hot as the other 2 anyway) and I can see a big time difference in speed. So I guess its true, the third times a charm in the case of these 64 gb Sandisk Ultra cards.
Big thanks again to nicholi2789 for pointing me in the right direction!
I bought a SanDisk Microsdxc class 10 64gb and let the phone format. It's working great. It has the fastest speeds out of all I've seen.
It's a SanDisk Ultra 64 GB MicroSDXC Class 10 UHS-1 Memory Card with Adapter (SDSDQU-064G-AFFP-A)
At Amazon.
Sent from my SCH-I545 using xda premium
kaos2569 said:
Well I followed everything nicholi2789 suggested and low and behold my card is actually working good. It does not get hot when reading ( not as hot as the other 2 anyway) and I can see a big time difference in speed. So I guess its true, the third times a charm in the case of these 64 gb Sandisk Ultra cards.
Big thanks again to nicholi2789 for pointing me in the right direction!
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Glad you figured it out man. I didn't really do anything except to say keep trying. Lol. Good deal though.

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