64gb sd vs 32gb sd reliability and performance in i777? - AT&T Samsung Galaxy S II SGH-I777

Say you have the same exact micro SD make, could be sandisk or Samsung, class 10. Has anyone found that even though the 64gb card is usable, but not advertised as compatible that problems have occurred using the 64gb card?
The most important thing is making sure nandroid backups do not get corrupted. Also the larger the card, does it take longer for the media scanner to run?
Sent from my SGH-I777

I think you would be taking a risk using a card not certified as compatible with the device. As for media scanning, it all depends on how much data is actually on the card, but of course it would take longer to scan a larger card (and prolong bootup, as well). I used to have just an 8gb card and noticed a dramatic change in bootup when I went to the 32gb card I now have because I was able to put a lot more of my MP3s and movie files on it.

So would it be accurate to say a nandroid backup is more likely to fail in a galaxy s ii using a 64gb card than a 32gb? And I mean data getting corrupted, md5 errors. Perhaps you remove the card/unmount it then try to later use it for backup.
Sent from my SGH-I777

The problem I have found using cards larger than what's specified compatible is that the OS will try to copy data to a sector outside those on the largest supported card and then when it tries to read them later it can no longer find them because it doesn't recognize sectors beyond the card size limit. It may show the files in a directory structure because of the MBR or filetable reference, but it can't find the actual data because the data sectors are not recognized.

i'm using 32g class 10 and feel good !!! speed average about 10MB/s

I thought the max size supported was 32gb? Man I almost picked up that class 10 16gb Samsung at work (wouldve been $20 for an employee) but it turned out we had to order it which means no discount..
Sent from my crack smoking SGH-i777

The max size supported is 32gb, but 64gb will work fine in many cases. Some users have reported needing to format the card to use the fat32 file system, others have had it work fine out of the box. I read CWM won't be able to recognize it unless its fat32 however.
That's good info, Miami. Definitely makes sense.
Sent from my SGH-I777

ARPwizard said:
The max size supported is 32gb, but 64gb will work fine in many cases. Some users have reported needing to format the card to use the fat32 file system, others have had it work fine out of the box. I read CWM won't be able to recognize it unless its fat32 however.
That's good info, Miami. Definitely makes sense.
Sent from my SGH-I777
Click to expand...
Click to collapse
Yeh unfortunately exfat isn't recognized, so gotta use fat32. Booo. Maybe some day

Related

64gb Micro SDXC Card ?

Hey guys.
I know that 64GB micro SDXC Cards are no supportet by our X10.
But has someone here testet this ?
http://androidcommunity.com/sandisk-64gb-micro-sdxc-cards-working-on-multiple-android-devices-20110927/
Well, well, well...This would be an early christmas for me if it works. Have been forced to constantly streamline my music collection and dare I say with the new Xperia specs showing just 32GB internal storage and no micro SD card support, I sincerely hope Sony, that if it is true, it is a one off experiment. The average consumer hungers for more storage each time, fact.
Even the newer phones came out these few months only supports 32GB micro SD.
And by the way, I thought all Xperia phones are using micro SD?
Sent from my X10i using XDA App
Guys I' taking the plunge. If you see the youtube clip from the 1st post, all we need is to format it (probably with a SG SII) which should change the format to fat32 readable by our devices. If it should come to the worst I'll flog it on the SG II xda site or ebay.
Update 14/11/11 64GB micro SDXC Card works flawlessly with X10. Simply insert new card, phone will not recognise the format and will give message that card is damaged. Simply format (which is erase micro sd option on X10) and ENJOY!
down4wotever said:
Guys I' taking the plunge. If you see the youtube clip from the 1st post, all we need is to format it (probably with a SG SII) which should change the format to fat32 readable by our devices. If it should come to the worst I'll flog it on the SG II xda site or ebay.
Update 14/11/11 64GB micro SDXC Card works flawlessly with X10. Simply insert new card, phone will not recognise the format and will give message that card is damaged. Simply format (which is erase micro sd option on X10) and ENJOY!
Click to expand...
Click to collapse
sounds good!
where'd you get the card at and how much was it?
tuner520 said:
sounds good!
where'd you get the card at and how much was it?
Click to expand...
Click to collapse
Amazon UK, £114.95 + 1.95 postage, only one left in stock; go get it
http://www.amazon.co.uk/dp/B005LFT4...de=asn&creative=22218&creativeASIN=B005LFT40G
Happy X-mas
This is a fine xmas present! ;-)
149€ on amazon.de
HOLY MOTHER OF GOD... 64GB XPERIA!!!!
Sent from my X10i using XDA App
Keep in mind, there might be a problem once you store files beyond the 32GiB limit of the SDHC standard. Weird things and corruption might occur.
Sent from my X10i using XDA App
Oh yes, it's important to test if it work with files over 32gb uage or it's not useful then to buy it too, any updates about it?
down4wotever said:
.........
Update 14/11/11 64GB micro SDXC Card works flawlessly with X10. Simply insert new card, phone will not recognise the format and will give message that card is damaged. Simply format (which is erase micro sd option on X10) and ENJOY!
Click to expand...
Click to collapse
Thanks a lot!
SysGhost said:
Keep in mind, there might be a problem once you store files beyond the 32GiB limit of the SDHC standard. Weird things and corruption might occur.
Click to expand...
Click to collapse
mhmm, thats because they created a new data format for SDXC and we're reformating to SDHC standard? I'll think i'll get a 64gb Card Not like the 128gb versions will come out soon, right ?
Haldi4803 said:
mhmm, thats because they created a new data format for SDXC and we're reformating to SDHC standard?
Click to expand...
Click to collapse
It's not about the reformat. It's lower than that.
When id comes to SDcard readers, micro or normal, there are basically two types:
Type 1:
Hardware/firmware-driven, that uses it's own hardware to manage the basic functions of the SD-card and presents is as an UMS device (USB Mass Storage)
The benefit from those readers are less utilisation of the main CPU followed by higher throughput.
The backside is the limited support of what standards it can use.
Type 2:
Software/"dumb" reader. It'll just provide a "physial" connection to the underlying USB-system, and presents it "as is": a SD-card flash memory.
In this "dumb" mode, the Operating system must provide all the routines in order to communicate properly with the attached SD-card.
The benefit with those are full range compatibility with future standards, but it depends on software, drivers and the main CPU, which might result in slightly lower speeds and "sluggishness" as the IO-operations increases.
However, if the OS and the SDHC/SDXC drivers in question is poorly optimised, the hit on the CPU can be drastically high whenever a read/write occurs.
So, which one is prefered then?
It's up to the manufacturers of the hardware and the operating system.
In our case here, Android can use both UMS devices, as well as generic/default SDHC and SDXC flash cards.
In my opinion, the type 2, "dumb" readers, are the "best" ones.
The only limitations of what cards these readers can use, is only limited by the operating system and the kernel modules/drivers provided.
And the "load" on the CPU as generally so small it's often neglectable, provided the drivers and OS is well optimised.
Which type the X10 smartphone uses I cannot tell.
I simply don't know, but it sounds promising, as there haven't been any "corrupted data" reports from the few who are using 64GiB cards...
... yet!
If the X10 smartphone does utilise the type 1 reader, the firmware/hardware based one, it might "kick back", as data stored beyond the 32 GiB limit of the readers limitation, might just "disappear into the void", never reporting any errors.
Users might notice this first when they try to access the previous stored files and finds out the content returned are just a stream of nulls. (null = digital void, nothing, nada, true zero, blank)
If and When this happens, only time can tell.
Someone has to try fill the card "to the brim", and copy back the content verifying everything is correct and proper.
Not just the filenames and filesizes, but also the content itself. (Checksum methods should suffice)
Just to +1 the above post. When the manufacturer states a maximum card size its not what the phone can mount but what it can reliably use. There's a good chance that you'll have corruption if you continue to use it.
Anyone got any news on this?
Does it truly work with all 64 Gibibytes, or is only half of it useful as I suspect?
got ne for myself! Sandisk Class 6 64gb !
Have something like 40gb full. Works well!
Awesome!
Haldi4803 said:
got ne for myself! Sandisk Class 6 64gb !
Have something like 40gb full. Works well!
Awesome!
Click to expand...
Click to collapse
can u post some benchmarks and screenshots plz and do you feel any kind of slowness or lag at all?
Nice this is very nice.
Maybe u should go to some IT shop and try it out.
I guess the X10 din show its support with 64G is coz at dat time, 64G micro-SDHC havnt come out yet.
rachit_rox said:
can u post some benchmarks and screenshots plz and do you feel any kind of slowness or lag at all?
Click to expand...
Click to collapse
Wish i could -.- but somehow the Phone (or what ever, never took it out!) Corrupted the MicroSD Card!
Then Phone Plays dead with a Corrupted MicroSD Card. Wont start up !
put the Card into SD Card and reade on my computer and that one says corrupted format. Need to reformat -.- But then "Computer cant Format that card" -.-
AND the Card gets ****ing HOT! nearly burnt myself! more than 50°C for sure! Also only shows 30MB space! But i had over 40gb data on it! so its a real one!
Guess i'll got an defective Card -.-
But about the Read/write values. had something like 6-7mb write and 30mb read.
Haldi4803 said:
Wish i could -.- but somehow the Phone (or what ever, never took it out!) Corrupted the MicroSD Card!
Then Phone Plays dead with a Corrupted MicroSD Card. Wont start up !
put the Card into SD Card and reade on my computer and that one says corrupted format. Need to reformat -.- But then "Computer cant Format that card" -.-
AND the Card gets ****ing HOT! nearly burnt myself! more than 50°C for sure! Also only shows 30MB space! But i had over 40gb data on it! so its a real one!
Guess i'll got an defective Card -.-
But about the Read/write values. had something like 6-7mb write and 30mb read.
Click to expand...
Click to collapse
This had to happen when SE said it was compatible with 32gb
Sent from my Xperia S using XDA

PNY 32gb class10 SDHC, mounted once, and never again?

so I just bought this card cause I use lots of storage space pretty quickly, My question is wtf is going on here? it just sticks on "checking for errors" and never gets past it, it mounted up once and while I was dumping files on it over USB from my computer (in usb mass storage mode) both it and my internal storage just disappeared, the copy operation failed, so I restarted the phone and I have yet to get the phone to mount it since then.
I'm running eclipse 1.3rc2, is this because of the sd flip-flop, the size of the card or the fact that it's class 10?
the card works perfectly fine in my camera, and in multiple PCs, but as soon as I stick it in my X2, it just doesn't want to work.
I noticed the stock SD card has a "bootable" partition flag, whereas this one doesn't. maybe this is my problem?
also what filesystem should I use, I run linux on my PCs so I can do whatever I want with it.
what if I just delete its partition table, put it in the phone and then let the phone format it? I've reformatted it with my PC and no dice.
Cheapxj said:
so I just bought this card cause I use lots of storage space pretty quickly, My question is wtf is going on here? it just sticks on "checking for errors" and never gets past it, it mounted up once and while I was dumping files on it over USB from my computer (in usb mass storage mode) both it and my internal storage just disappeared, the copy operation failed, so I restarted the phone and I have yet to get the phone to mount it since then.
I'm running eclipse 1.3rc2, is this because of the sd flip-flop, the size of the card or the fact that it's class 10?
the card works perfectly fine in my camera, and in multiple PCs, but as soon as I stick it in my X2, it just doesn't want to work.
I noticed the stock SD card has a "bootable" partition flag, whereas this one doesn't. maybe this is my problem?
also what filesystem should I use, I run linux on my PCs so I can do whatever I want with it.
what if I just delete its partition table, put it in the phone and then let the phone format it? I've reformatted it with my PC and no dice.
Click to expand...
Click to collapse
When I got the 8gb card and using now it was acting weird ...would copy files when in the phone. I formatted it using the phone and it has worked fine since.
Good luck.
I can't say it will work for u but it cured the problems I had at the time.
just make sure u format the right card since in eclipse its switched around and recognized as internal in menu.
well, It took exchanging it for a class 4, and now it seems perfectly fine.
so note to self (and others)
NO CLASS 10 CARDS IN DROID X2, IT DOESN'T FN WORK!
Cheapxj said:
well, It took exchanging it for a class 4, and now it seems perfectly fine.
so note to self (and others)
NO CLASS 10 CARDS IN DROID X2, IT DOESN'T FN WORK!
Click to expand...
Click to collapse
I don't think that is true...I thought I saw plenty of users say they use them.
Mine is class 6 and works just fine
Did u try formatting from in the phone while stock? Don't know if that would make a difference at all
I didn't read one single thread from someone successfully using a class 10 card without having issues, sometimes it took a few days/weeks, it only took me one mount/dismount cycle.
besides, the class 10 cards, while having a higher sustained transfer rate, their seek times and random access times are overall slower. basically these class 10 cards are ONLY good for digital video cameras and things that don't actually utilize a filesystem.
that or they're getting cheap chinese cards that are just remarked class 6 cards, the X2 can't read and write to a class 10 fast enough resulting in data corruption, period.
Yeah im not arguing
I understand what ur saying now
I can confirm class 6 being completely fine tho
I think the "issues" I had was the file size I was trying to transfer(4gb)
I don't think it's the class rating but the capacity. In my experience 32 gb cards just aren't as reliable as smaller-capacity ones. Perhaps it's a consequence of packing too many memory cells into such a small form factor, I don't know, but I've had three 32 gb micro-SD cards fail on me since the beginning of the year, whereas not a single 16 gb card has failed me yet.
I just dumped 4.8gb of crap on it, over usb and it took it like a champ, it's also significantly faster than the stock 8gb card in terms of mounting, remounting, scanning my media and even opening up fileexpert is faster.
class 6 i'm sure is fine, probably the best balance, but I can even take HD video straight to this card with no frame dropping or glitching. it's currently playing hd video on my hotel room TV right off the SD card w/ no issues (the stock 8gb couldn't do that)
Ha. Mine came wit a 2gb class 2 sdcard ...
Wait...now that I think about it.. I had bought a droid pro initially. It had a screen issue...I took it back and paid extra to get the x2. Then I told em I didn't wanna lose my pics/video I had taken and he switched the cards. So I guess he basically just kept the one I wax supposed to get instead of moving my data to the new one....prick...
iCurmudgeon said:
I don't think it's the class rating but the capacity. In my experience 32 gb cards just aren't as reliable as smaller-capacity ones. Perhaps it's a consequence of packing too many memory cells into such a small form factor, I don't know, but I've had three 32 gb micro-SD cards fail on me since the beginning of the year, whereas not a single 16 gb card has failed me yet.
Click to expand...
Click to collapse
what brand(s)?
I'm using a Patriot LX 32GB Class 10 MicroSDHC now. I came from a Lexar 32GB class 10 which failed within a month. I haven't had any problems with the Patriot.
i am using a class 4 32gb card and transfer 16g of music on and off at one time constantly with no problems. i have had it since july
ninjasailas said:
i am using a class 4 32gb card and transfer 16g of music on and off at one time constantly with no problems. i have had it since july
Click to expand...
Click to collapse
post the brand too.... this info is not useful.
in my case the 32gb class 10 pny card worked fine in everything but this damn phone.
L2_n19h7m4r3 said:
I'm using a Patriot LX 32GB Class 10 MicroSDHC now. I came from a Lexar 32GB class 10 which failed within a month. I haven't had any problems with the Patriot.
Click to expand...
Click to collapse
I use the 16gb of this and it works great. I did hear more than once that even a good 32 gb can be a problem.
My pny class 10 32gb is still rockin with not a single error
from my X2 roaming the north

[Q] 64GB or higher SD card on SGH-I777 (AT&T)?

Hello All: who has tried SD cards >32GB on the SGH-I777? What's your impression? Do they work, which ones, and how well? There are threads on 64GB SDs working on other devices, but nothing recent on the GS2 (I777). So what's the deal?
My 32 gb working fine. I got it fr ebay came fr Honkong no name sd
Sent from my SAMSUNG-SGH-I777 using xda premium
I saw a YT vid of one being used in a GSII a few months back. It wasn't available to the public yet but it showed that the phone recognized the card and read all 64gigs. From what I hear, there's a 64gig card available now and a few members have them but I haven't heard how well they work.
Running a Samsung Plus 64gb class 10..
Sent from my SAMSUNG-SGH-I777 using xda premium
axis01 said:
I saw a YT vid of one being used in a GSII a few months back. It wasn't available to the public yet but it showed that the phone recognized the card and read all 64gigs. From what I hear, there's a 64gig card available now and a few members have them but I haven't heard how well they work.
Click to expand...
Click to collapse
Thanks! Yes, I saw that too but it's several months old now and I have not seen anything new. There is now a class 10 from Transcend - wonder if anybody tried it. I really like to hear from people using the 64GB cards (or higher).
Stevenrogers_420 said:
Running a Samsung Plus 64gb class 10..
Sent from my SAMSUNG-SGH-I777 using xda premium
Click to expand...
Click to collapse
And? What's your take? BTW, where did you get that card from?
Works great. Fast. Frys electronics...
Sent from my SAMSUNG-SGH-I777 using xda premium
Sd cards > 32GB is called SDXC cards. the smallest is 64GB. They typically come pre-formated with exFat which our phone doesn't support. You will have to use PC to re-format it into FAT32 using large cluster size before you can use it on the phone (the hardware of the phone supports SDXC cards
As I understand it, the phone supports SDXC.
Many 64GB SDXC cards are comming formatted as regular FAT which will work in our phone.
The SDXC standard officially calls out an exFAT filesystem - exFAT will NOT work.
What's with the class on the card never really noticed it what's it mean oh sorry for the thead hijacked...
sent from interspace on my hacked telly...
Class rates the write performance of a card (in MB/sec). So a class 10 card has a write performance of at least 10MB/s (write speed varies depending on the size of data). Typically, cards read much faster than write (on average 2x faster).
foxbat121 said:
Class rates the write performance of a card (in MB/sec). So a class 10 card has a write performance of at least 10MB/s (write speed varies depending on the size of data). Typically, cards read much faster than write (on average 2x faster).
Click to expand...
Click to collapse
Thanks. I read somewhere in another forum that someone was using a 64GB class 10 card formatted as FAT32 and got ~5MB/sec, suggesting that the format slows the card. My current 32GB micro SD gives me also ~5MB/sec (guessing its a class 4/5 without pulling it out), so a 64GB at 5MB/sec would be ok. I will get me one and report back. Just not sure yet which one. Sandisk? Samsung (haven't seen that one online yet).
Look what I just found:
http://www.engadget.com/2012/01/09/sandisk-unveils-worlds-fastest-128gb-sdxc-card-and-new-inand/
Class performance is only measured on a specific test... and can sometimes not be indicative of real-world results.
Sometimes people find that a Class 6 card does better overall than a Class 10, just due to being "better" in real world aspects other than what were tested for the class rating.
The class rating MIGHT only be raw write performance - the format of a card can have a major effect on performance depending on the underlying flash memory. For example, I recall a bunch of 4GB CF cards that got a HORRIFIC performance reputation at work - after further investigation, it turned out the only problem was that Windows defaulted to FAT32 on those cards, but FAT16 on smaller ones. The 4GB card formatted FAT16 was wicked fast.
My current class 2 16GB microSD card can give me 6MB/s write speed when I copy a small to medium sized file over. However, when I copy muiple or much larger files, the speed will eventually drop to 2MB/s. Most cards, especially cheaper ones, use a small cache to speed up the write performance and hide the slower flash memory. When you writes more than the cache can hold, the true performance of the card shows up. That's why a brand named card costs much more than no-name brands of the same class rating.
foxbat121 said:
My current class 2 16GB microSD card can give me 6MB/s write speed when I copy a small to medium sized file over. However, when I copy muiple or much larger files, the speed will eventually drop to 2MB/s. Most cards, especially cheaper ones, use a small cache to speed up the write performance and hide the slower flash memory. When you writes more than the cache can hold, the true performance of the card shows up. That's why a brand named card costs much more than no-name brands of the same class rating.
Click to expand...
Click to collapse
Actually, the cache is the phone's RAM, not the card.
I love my 64gb card. $100 shipped from bestbuy. I want to buy one for my tablet.
Sent from my SGH-I777 using xda premium
Entropy512 said:
Actually, the cache is the phone's RAM, not the card.
Click to expand...
Click to collapse
No, I'm testing it on my PC with 8GB of RAM directly. Don't trust phones for that task
My understanding is that most SD cards has a small block of flash cells that's much faster than rest of the cells. Small data chunks get write into those fast flash cells first before they write into the much slower mass storage cells. So, if you copy a large file into the SD card, you will see the write performance slowly drop as the cache fills up.
Aren't there 64GB cards that are SDHC?
AtlanM87 said:
Look what I just found:
http://www.engadget.com/2012/01/09/sandisk-unveils-worlds-fastest-128gb-sdxc-card-and-new-inand/
Click to expand...
Click to collapse
without looking, if that's the same article I read, it isn't micro size. the 64 is, though.
Firepac said:
Aren't there 64GB cards that are SDHC?
Click to expand...
Click to collapse
Here are how it works:
SD: up to 2GB --> FAT16 formatted
SDHC: from 4GB up to 32GB ---> FAT32 formatted
SDXC: from 64GB to 2TB ---> exFAT formatted (although some come with FAT32 formatted for compatibility reasons).

64Gb Micro SD card

Does anybody know if the Tab 7.7 can use a 64Gb Micro SD card?
Probably not. Most Android tablets only go up to 32GB
Sent from my LG-VM670 using xda premium
I have a 64gb micro sdxc.. all i did was format it to fat32 when i inserted it and it seems to work. .
Sent from another Galaxy...
Tab 7.7
maconsultant said:
I have a 64gb micro sdxc.. all i did was format it to fat32 when i inserted it and it seems to work. .
Sent from another Galaxy...
Tab 7.7
Click to expand...
Click to collapse
Yep, same here. Stupid FAT32 doesn't let you copy files bigger than 4Gb though, so that sucks. Now if only there were some way to format the SD card using EXT2,3,4 or whatever, or get the Tab to easily recognize exFAT.
I did notice when i tried to copy a file from the internal memory to the external memory
It didnt work while i was unrooted. But since i have rooted i have not experienced this again..
Sent from another Galaxy...
Tab 7.7
I use 64 GB card and no problem.
Most manufactures says their devices is supporting microSD up to 32 GB, but really it's just a phrase.
I've tried 65GB microSD on my Galaxy S II and it worked then I tried it on my Galaxy S I also worked !! which made me try it on little Sony Xperia mini and also worked !!!
Just try it, Im sure it will work.
Yep no problems over here either.. Just need to format the card when it's in the device..
Sent from my GT-I9100 using Tapatalk
conradwinchester said:
Does anybody know if the Tab 7.7 can use a 64Gb Micro SD card?
Click to expand...
Click to collapse
I have 64Gb Kingmax MicroSDXC. Works fine.
Confirmed a while ago:
http://www.androidnz.net/2011/09/sandisk-64gb-micro-sdxc-cards-confirmed.html
My 64GB card has worked in every Android device I've tried it in, check that blog post for my list - also confirmed working in many other devices by others.
looking to maybe getting a micro sd card, not sure if i should go for the 32gb with price range of $30-$70 or fork out the extra money for 64gb, over $150. what would you guys recomend? and is it even worth it going for the 64gb at this point? i have the 16gb tab and using 16gb from original 7" tab.
Well.. currently the cheapest one i could find was at play.com and that's not cheap at all... can't we use the usb adapter and connect an external HD to the device?
I went ahead and bought the 64gb card ($152USD on Amazon) as I like to keep as much as possible on my tab. As far as a usb hard drive, I would think it would need to be on that does not need to be powered through the usb connection.
it works just fine, i have 64GB almost used up on my SGS2
In terms of whether the 64GB is worth it: only you can answer that. Mine is basically full and I would like even more storage, some people can't even fill an 8GB card, so it's quite a personalised thing really.
You can use pen drives via the USB adapter if that suits your use.
It seems from other posts that 64Gb cards are entirely satisfactory but my additional question is "What class is optimal?" There are Class 4, Class 6 and now Class 10 cards with price generally higher for the higher class. I note that another poster has successfully used a Kingmax 64Gb MicroSDXC which, I believe, is Class 6.
Does anybody know what the specs are for the MicroSD slot on the tablet. Obviously, it would be overkill and a waste of money if the device cannot read and write at the higher speeds that the card supports. Has anyone done any benchmarking?
I was considering a 64Gb Class 10 card for AU$125 but am wondering if the tablet can actually make use of it and a cheaper card would suffice.
the Sandisk 64 is a Class 6
http://forum.xda-developers.com/showthread.php?t=1343164
I think when it comes to the difference in class, the simple explanation is the random access speed vs sustained data transfer speed.
Correct my current understanding if I'm wrong, but generally speaking, lower class = faster random access speeds, but slower sustained data read/write, whereas higher class = faster sustained read/write speeds, but slower random access.
Can anyone confirm or expand upon this?
that's why a Class 6 is just the sweet spot right smack in the middle of both
yeah Class 10 are faster to transfer huge files but slower on smaller files
and class 2 to class 4 are faster for smaller files but extremely slow for huge files like a 4 GB movie file for example
AllGamer said:
that's why a Class 6 is just the sweet spot right smack in the middle of both
yeah Class 10 are faster to transfer huge files but slower on smaller files
and class 2 to class 4 are faster for smaller files but extremely slow for huge files like a 4 GB movie file for example
Click to expand...
Click to collapse
Yeah, that's kinda what I figured.

[q] 64gb sdxc

Hi guys,
I've did a search on the forums before posting but it seems no ones ansked the question!
Has anybody tried using a 64GB SDXC card via the SD connector?
I've already formatted the card into FAT32 but any data that's written to the card AFTER 30Gb +- cannot be read....although Im able to browse around the file structure.
any ideas guys?
Thanks all!
3.2 Stock, Samsung Galaxy 10.1 32 GB
I've been using a 64gb SanDisk cruiser USB drive since I bought my tab. I know it is not a direct answer to your question, but the thumb drive works fine in the official USB adapter.
I can however see the whole drive in windows, both XP PRO, and Win 7. The drive came pre-formatted FAT32 from SanDisk, entirely one partition, and apparently readable fine on anything I have run across. From what I understand, you should be able to format your card NTFS if you are using pershoot's kernel.
Later,
Jason
USB mass storage watcher in the market will allow you to mount a NTFS drive with stock firmware.
Since the tab only has a OTG USB connector, if the card adaptor supports sdxc then it should work. When you formatted the card, what was it formatted as before? Was it a quick or full format?
Sent from my GT-P7510 using XDA
thanks for the replies guys,
its a PNY 64GB SDXC it originally came in a exFAT format, Ive partitioned in quick format via 2 different programs.
Try a full format. With a large cluster size like 16k.
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One other thing to mention would be that there are tons of counterfeit SD cards on the market, and unless you got yours from a very reputable seller, there is a chance that it is hacked to report a higher capacity then it has.
The comment you made about being able to navigate the file system, but not open anything past 30g is pretty close to exactly how those counterfeit cards behave. I would be surprised if they used a 32g card as a base for the hacked card, but anything is possible... Anyhow, try H2testW, a google search will turn up download links. It is a free program that will write data to a target device until it fills the device. Then it will attempt to read it back and verify it's contents. After a certain number of mismatches, it will report the memory as likely defective.
This saved my butt a few times on some SDHC card purchases. It takes quite some time to run, especially with large drives, but the big plus here is that it verifies the flash memory before you put it in a device and loose a bunch of data that might be irreplaceable.
Good Luck,
Jason
Ive attempted to do a full format still no luck
The card isnt a knock off, its from a reputable seller and the contents are available to browse ( incl. read write) on a normal desktop computer.... could it just be Android doesnt like 64gb SDXC cards?
I see, I thought you meant that after 30g you could just see the file structure but not access. I'm not sure if it is possible with the tab's USB otg adapter, but if you can format it with the tab, it might work. I know this has worked for people with phones that the manufacturer said was limited to 32g sdhc, phone would not read the full 64g until the people formatted with Android and card in phone.
Other than that, I'd try format ntfs (think only win 7 has this capability for flash) but there are stand alone apps, as well as Linux and parted... Other than that I don't have any other ideas... It might be it doesn't like the xc cards, but I don't think anything electrically changed with the card spec. This is complete speculation, but it seems that if it can handle the 64GB of nand flash in my thumb drive, it ought to be able to deal with the 64GB of nand flash in a sdxc card.
Good luck,
Jason
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SDXC is different to SDHC in the same way that SDHC is different to SD.
Does the card reader indicate being able to support SDXC? If not, it's understandable why it is not working as expected and I'm a bit surprised it's partly working.
Are you using the same card reader for the computer with the Galaxy TAB?
At least with SD, they made a clear indication for different memory types / supported sizes. With XD, there was a 512MB limit where older devices would not recognise anything higher but the higher capacity cards were also just called XD.
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