I just received this in the mail and I was wondering where do I start in terms of formating format and allocation size? Also, how would I check its true capacity and transfer rates?
put it in the phone & let it format for you, it formats exFAT but I was using a 64GB card. Not sure if it does FAT32 if using a 32gb or smaller sd card. If you need FAT32 then use linux or Windoze to format it & I always "default" for allocation size.
that is my question too. thanks
I have a Sandisk Ultra SDXC 64GB Class 10 UHS-1 Micro SD card in my T999 T-Mobile Galaxy S III phone.
The card has become "damaged" (Samsung's term). 4 times now. Please note that the card works fine on my Window 7 PC. This last time I formatted the card in the phone, put the card in the PC, copied a bunch of files to it (about 3GB) and then put the card back into the phone. And the phone said that the card might be damaged. I was sure to unmount the card before removing it.
I called T-Mobile tech support and they know nothing about it.
I called Sandisk and they said "There are known problems with Samsung Phones and Tablets and Sandisk Class 10 cards. Samsung is aware of this and working on it. Would you like us to replace your Class 10 UHS-1 card with a Class 6 card?"
I called Samsung tech support and they know nothing about it and are not setup to tell their engineers about issues. The only way to report an issue to engineering is via email.
Let's make a loud stink about this so Samsung/T-Mobile will fix it.
Follow up on original post:
I went out and purchased the recommended Sandisk 64 GB SDXC Class 6 memory card and the problems are exactly the same as with the Class 10 card.
The problem seems to appear when there is more that 4GB (I'm not sure if it is exactly the 4GB barrier or not) on the card the Galaxy S III has a problem mounting the card. Note that once the card has gone greater than 4 GB even deleting files to reduce it below 4 GB does not allow the card to be mounted.
On the class ten card I was able to successfully run the fsck -t exfat command on the card that Android would not mount. fsck returned no errors or problems found.
My testing is rather limited but I can say: The T-Mobile Galaxy S III (T999) does not work correctly with SanDisk Ultra 64 GB SDXC memory cards (class 6 or Class 10)
Please, let's spread this around so that maybe Samsung, T-Mobile and SanDisk will learn how to work together and solve the problem for the sake of their customers.
I put the new card in the phone and formatted it in the phone.
I don't quite understand how you got 2 crap microsd card, I'm using a Samsung ultra 32gb class 10 just fine, never had one problem mounting it never seen one error message. Sorry
Sent from my SGH-T999 using xda premium
achmedclaus said:
I don't quite understand how you got 2 crap microsd card, I'm using a Samsung ultra 32gb class 10 just fine, never had one problem mounting it never seen one error message. Sorry
Sent from my SGH-T999 using xda premium
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Click to collapse
I think it is a software problem with the 64 GB Micro SDXC Card.
I have a Sandisk Ultra SDXC 64GB Class 10 UHS-1 in my Galaxy SIII and have never had an issue. I had problems formatting the card in my PC, So i just threw it in the phone and formatted it there. It was formatted and I have loaded about 25gb of music, 5gb of pictures through Cheetah Sync without issue.
picachux said:
I have a Sandisk Ultra SDXC 64GB Class 10 UHS-1 in my Galaxy SIII and have never had an issue. I had problems formatting the card in my PC, So i just threw it in the phone and formatted it there. It was formatted and I have loaded about 25gb of music, 5gb of pictures through Cheetah Sync without issue.
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Click to collapse
Have you rebooted your phone or unmounted and remounted the card? That is when the problems occur.
I believe that there is a bug in the code the Samsung uses to check the card prior to mounting. They are doing more than just a simple
fsck -t exfat.
I tried a 32 GB SDHC Samsung Class 10 card with the exact same data that was on the 64GB SDXC card without any problems. It is my belief that there is a bug in exFAT code in the Galaxy S III.
Thanks for your comments.
I have only unmounted the card twice to kickstart the media scan after loading some music and I reboot my phone every 2 days or so.
ChitownWingMan said:
Have you rebooted your phone or unmounted and remounted the card? That is when the problems occur.
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Click to collapse
I've reboot my phone all the time—I don't have any problems. I don't mount/unmount very often, but just tried it now and everything appears to be fine.
My card is a 64 GB class 5 SanDisk, formatted FAT32 (done on a Linux machine).
tamasrepus said:
I've reboot my phone all the time—I don't have any problems. I don't mount/unmount very often, but just tried it now and everything appears to be fine.
My card is a 64 GB class 5 SanDisk, formatted FAT32 (done on a Linux machine).
Click to expand...
Click to collapse
I believe the bug is in the exFAT drivers in the S III.
I formatted the card in the S III under the mistaken assumption that the phone would know best.
The theoretical maximum size of FAT32 is 2TB. However, since Microsoft in their infinite wisdom decided only to support FAT32 up to 32GB (most likely to force people to use NTFS) support for FAT32 above 32GB is spotty and unreliable.
This being said if you format a 32GB card or smaller in the Galaxy S III, it will be formatted FAT32. If you format a 64GB (or greater I presume) in the Galaxy S III, it will be formatted exFAT.
I will try formatting the card as a 64GB FAT32 partition. However, this will mess up my using a USB 3.0 card reader (at 5Gb/S transfer rate) to write to the card. Writing to the card via WiFi is interminably slow by comparison.
Sounds like windows is damaging the exFAT partition when you plug it in to your computer to transfer stuff. I've never done that because I just use Cheetah Sync to sync my iTunes(25gb) folder to my sdxc card and to sync my pictures/videos from the sdxc to my pc.
ChitownWingMan said:
I believe the bug is in the exFAT drivers in the S III.
Click to expand...
Click to collapse
Seems that way to me too. exFAT is not in Linux upstream, so I imagine Samsung just bought a binary driver from someone. Who knows the quality.
I will try formatting the card as a 64GB FAT32 partition. However, this will mess up my using a USB 3.0 card reader (at 5Gb/S transfer rate) to write to the card. Writing to the card via WiFi is interminably slow by comparison.
Click to expand...
Click to collapse
What does the card reader have to do with it? I've a USB 3.0 card reader, and my 64 GB FAT32-formatted fine.
As I recommended in the other thread, use a Linux Live CD to format your SD card.
tamasrepus said:
Seems that way to me too. exFAT is not in Linux upstream, so I imagine Samsung just bought a binary driver from someone. Who knows the quality.
What does the card reader have to do with it? I've a USB 3.0 card reader, and my 64 GB FAT32-formatted fine.
As I recommended in the other thread, use a Linux Live CD to format your SD card.
Click to expand...
Click to collapse
or use Partition Wizard Home Edition (free)(windows) for large fat32 format jobs works perfectly and the price is right http://www.partitionwizard.com/free-partition-manager.html
picachux said:
Sounds like windows is damaging the exFAT partition when you plug it in to your computer to transfer stuff. I've never done that because I just use Cheetah Sync to sync my iTunes(25gb) folder to my sdxc card and to sync my pictures/videos from the sdxc to my pc.
Click to expand...
Click to collapse
Because I thought the same thing one of the tests that I performed was to never remove the card from the phone. I did all of my copying to and from the card via File Expert Web Sharing. One day I ran the phone battery down and the phone rebooted. When it came back up it was unable to verify the card. However, fsck -t exfat found no problems with the card.
One interesting point, I was using Cheetah Sync (a great program) last night to copy a TitaniumBackup directory to the phone and it failed. Here is a copy of the email I sent to the developer:
The destination directory contains 11,841 files totaling 2.93GB and Cheetah needs to download 1917 files and is failing on the 1st file with the error "Sync Error - I/O error downloading files.".
Note: Cheetah Sync had already copied almost 7,000 files. It originally failed during a copy of almost 9,000 files. I restarted
the sync and that is why it failed on 1 of 1,917 files.
I am using a T-Mobile Galaxy S III (Model SGH-T999) with 32 GB internal memory and a 32 GB external SD Card (Samsung Class 10).
The source directory is c:\phone\card_backup\TitaniumBackup and the destination directory is /mnt/extSdCard/TitaniumBackup.
I am able to manually create a file in that directory using a file explorer.
tamasrepus said:
Seems that way to me too. exFAT is not in Linux upstream, so I imagine Samsung just bought a binary driver from someone. Who knows the quality.
What does the card reader have to do with it? I've a USB 3.0 card reader, and my 64 GB FAT32-formatted fine.
As I recommended in the other thread, use a Linux Live CD to format your SD card.
Click to expand...
Click to collapse
The card reader is not the issue just the mechanism to allow me to copy files quickly from/to the card.
How Windows will handle a FAT32 partition greater than 32GB is my concern. In the past I have always used NTFS for drives/cards greater than 32GB because FAT32 has a 4GB - 1 file size limit and I have many video files that are larger then that.
MiniTool Partition Wizard and Easeus Partition Master can both also make a 64GB FAT32 partition.
Thanks...
Update
There is an update to this thread here:
http://forum.xda-developers.com/showpost.php?p=29904990&postcount=10
I just received my SanDisk Ultra 64 GB microSDXC Class 10 UHS-1.
What's the best way to prepare it for my Note 2 (fat32, exfat, etc)?
Is there a particular way it needs to be formatted to be accessible via TWRP?
Thanks!
I did exfat on my card so I can put files larger then 4gb on it. Best way to format it is if you have some way to plug the card into your computer. Ib myself mounted my card through the recovery and formatted on my computer that way.
Sent from my SPH-L900 using Tapatalk 2
format the card in the phone. You do it within Android in the settings area. I'm not sure what format, but I think it's NTFS. It's what I did, and I have put files larger than 4GBs.
On a side note, the file size issues doesn't come up except with media such as movies.
Does the OGP support exFat ? I hate the 4Gb limit of FAT32. How can I overcome this limit ?
pallcsa said:
Does the OGP support exFat ? I hate the 4Gb limit of FAT32. How can I overcome this limit ?
Click to expand...
Click to collapse
FAT32 supports partitions up to 32 GB. If you notice, out of the box the G Pro comes with a hidden partition and an 23 GB partition as Internal Storage. I have a 32 GB MicroSD card formatted as a single 32 GB FAT32 partition.
You only need ExFAT if you plan on using a 64 GB MicroSD card. Since LG advertises that the G Pro can support up to a 64 GB MicroSD card, then its likely that the stock ROM and kernel do support ExFAT. If for some reason it doesn't, then replacing the ROM with one of the Android 4.4 KitKat ROMs will surely do the trick.
DonS said:
FAT32 supports partitions up to 32 GB. If you notice, out of the box the G Pro comes with a hidden partition and an 23 GB partition as Internal Storage. I have a 32 GB MicroSD card formatted as a single 32 GB FAT32 partition.
You only need ExFAT if you plan on using a 64 GB MicroSD card. Since LG advertises that the G Pro can support up to a 64 GB MicroSD card, then its likely that the stock ROM and kernel do support ExFAT. If for some reason it doesn't, then replacing the ROM with one of the Android 4.4 KitKat ROMs will surely do the trick.
Click to expand...
Click to collapse
Well, I bit the bullet and formatted my 32Gb sdhc card to exFAT and the OGP can read it flawlessly. I am very pleased with the results because I got rid of the 4Gb file size limit. The only small issue is that cwm recovery can`t read or write exFAT so I have to make backups to my internal memory and then move them to the SD.
pallcsa said:
Well, I bit the bullet and formatted my 32Gb sdhc card to exFAT and the OGP can read it flawlessly. I am very pleased with the results because I got rid of the 4Gb file size limit. The only small issue is that cwm recovery can`t read or write exFAT so I have to make backups to my internal memory and then move them to the SD.
Click to expand...
Click to collapse
How do you format it into exFat?
Sent from my GT-N7100 using XDA Premium 4 mobile app
Well, it`s very easy. I put it in the card reader of the laptop and formatted it in the file manager of windows 7.
What filesystem do you use on G4 SD-card?
Why? What version of OS you have?
exFAT for external micro-SD card in LG G4 H818P. R/w perfectly. BB used Win7 x64
sahalento said:
exFAT for external micro-SD card in LG G4 H818P. R/w perfectly. BB used Win7 x64
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Click to collapse
It's faster then Fat32 or...?
Sent from my LG G4
sahalento said:
exFAT for external micro-SD card in LG G4 H818P. R/w perfectly. BB used Win7 x64
Click to expand...
Click to collapse
Do u do anything special to get exfat working? Do other apps see the exfat sdcard as an available source to access? I tried exfat but kept getting the error saying unsupported file system. Thanks
@welder73, not sure which is faster but exfat support larger than 4gb files while fat32 doesn't
About speed. I did'n see difference between exFAT and FAT32. About the same.
And I did'n do anything special to get exFAT. Just formatted micro-SD on PC via SDFormatter utility. I thing exFAT support may be available or not on different ROMs for different countries. I am on stock v10d-CIS. It's ok by default.
Also I saw then users flashed rooted system from one region to another stock ROM (SEA, PHL) - no exFAT support. May be answer is in some files in system (bin, etc) or in some files in another images from full KDZ/TOT.
Pterka said:
What filesystem do you use on G4 SD-card?
Why? What version of OS you have?
Click to expand...
Click to collapse
ExFAT on a big SD card. Because it's a one way street on a phone capable of shooting videos that cost half a gigabyte per minute.
Stock marshmallow H815 EU.
Didn't have to do anything special other than format it using the native windows 10 format application. Phone accepted it no questions asked.
Speed wise don't expect observable differences over previous file systems. SD card hardware is the main factor.
You have to use Fat32 for SD cards smaller than 32 GB and exFat for SD cards bigger than 32 GB. Speed and reliability depends on the brand of the SD card. I used without issues a Samsung micro SDHC EVO UHS-1 (32 GB) and a SanDisk Ultra Android microSDXC, 64GB, 80MB/s, Class 10, UHS-I.