Sandisk 64 GB Micro SDXC memory card exFat problems

[Guest Deus_ex11]

I bought a Sandisk 64GB card for my SGS3 but I have having problems with the exFat file system it uses.

I format it in the phone itself although it came preformatted and copy all my files from my 32GB card to it using my laptop and a micro sdxc card reader. I then put it in the phone and it flashes up that its a damaged card, WTF.

I got really worried for a moment and thought I had a dud or fake, but I bought from amazon so surely not. I then tried formatting it to fat32 but couldn't use windows 7 as it doesn't support it. I tried the HP format tool but that also gave me 'damaged card' after inserting it in my phone.

I then found another fat32 formatter somebody mentioned on another forum and then copied all my files on it again which takes a while by the way and hey presto it doesnt give me 'damaged card' when I put it in. I have played games and movies that are on it and no problems.

So it seems the reports that I read about exFat and 64GB micro sdxc cards working on this phone are false. It must be samsungs version of exFat thats the problem. I hope it will be fixed soon as I want to copy files larger than 4gb to it.

Does anybody have one of these cards or another brand? Are you having the same problems?

[Guest theFRAGGLE]

I "destroyed" two 32 GB cards and using a 8 GB for the moment, which works fine.

So should I NOT use the mobile to format the card again? I have a new 32 GB card from a different brand but want to be sure before using it. :)

[Guest Deus_ex11]

Maybe the destroyed cards you got were fakes. You can check if it has any problems with a windows app called h2testw.

I don't think the mobile will destroy your card. Formatting a 32GB card in the mobile will give you a FAT32 file system and a 64GB to exFAT.

[Guest shanky887614]

wierd.

never formated my card though

pulled it out of my old zte blade

and put it into s3

its ext3 btw (might have changed it to ext4 but i don't think so

[Guest skull_fcuk]

I have the same 64gb Class 10 Sandisk card, and it works fine. By the way, this phone is amazing, considering I upgraded from a Huawei G300 :D

[Guest Strianer]

I'm currently using a Sandisk 32GB Class 4, have copied all big games over there using DirectoryBind and haven't had problems with slowdowns at all.

Just amazing.

[Guest Deus_ex11]

I have the same 64gb Class 10 Sandisk card, and it works fine. By the way, this phone is amazing, considering I upgraded from a Huawei G300 :D

I have found out that once you copy over a certain amount of files over, about 12 to 13 thousand, it then becomes unstable and then 'damaged card' appears on your phone. I don't trust exFat on my sgs3. Its a pity as you could copy files greater than 4GB. I have found out a way of using NTFS on my sgs3 and 64GB card. It also supports 4GB+ files.

[Guest skull_fcuk]

I had a few teething problems, with errors showing and damaged card warnings,but i just formatted and went for it. works fine. files over 4gb are unnessecery to my mind.

[Guest José Bernardo]

I am having the same problem, and found out it is because /system/bin/fsck.exfat segfaults. Here are the relevant parts of logcat:

D/MemorySettings( 7159): Storage : Montar cartão SD

D/MountService( 2127):  :::: mountVolume :: path = /mnt/extSdCard from pid = 7159

D/MountService( 2127): doMountVolume :: Mouting path = /mnt/extSdCard with = mounting

D/MountService( 2127): externalstorage_lock_state =

D/VoldCmdListener( 4249): volume mount /mnt/extSdCard

I/Vold    ( 4249): /dev/block/vold/179:17 being considered for volume sdcard

D/Vold    ( 4249): Volume sdcard state changing 1 (Idle-Unmounted) -> 3 (Checking)

I/MountService( 2127): onEvent:: raw= 605 Volume sdcard /mnt/extSdCard state changed from 1 (Idle-Unmounted) to 3 (Checking) cooked =  605 Volume sdcard /mnt/extSdCard state changed from 1 (Idle-Unmounted) to 3 (Checking)

I/MountService( 2127): updating volume state checking

D/MountService( 2127): updatePublicVolumeState :: path = /mnt/extSdCard, state = checking

D/MountService( 2127): volume state changed for /mnt/extSdCard (unmounted -> checking)

D/Vold    ( 4249): Detected exFAT file system.

I/MountService( 2127): notifyVolumeStateChanged:: path = /mnt/extSdCard,old = unmounted,new = checking

D/MountService( 2127): sendStorageIntent Intent { act=android.intent.action.MEDIA_CHECKING dat=file:///mnt/extSdCard (has extras) }

D/MtpService( 2366): onStorageStateChanged /mnt/extSdCard unmounted -> checking

I/StorageNotification( 2251): Media {/mnt/extSdCard} state changed from {unmounted} -> {checking}

D/STATUSBAR-NotificationService( 2127): cancelNotification - pkg:XXX.XXXXXXX.XXXXXXXX, id:1628873367, tag:null

D/STATUSBAR-NotificationService( 2127): updateLightsLocked() : Turn off notification light

D/KeyguardViewMediator( 2127): setHidden false

D/ApplicationPolicy( 2127): isStatusBarNotificationAllowed: packageName = com.android.systemui

D/ApplicationPolicy( 2127): isStatusBarNotificationAllowed: packageName = com.android.systemui

D/StorageNotification( 2251): setMediaStorageNotification : notify id = 1628873367, path = /mnt/extSdCard, title = A preparar cartão SD...

D/STATUSBAR-NotificationService( 2127): enqueueNotificationInternal - pkg:XXX.XXXXXXX.XXXXXXXX, id:1628873367, tag:null

D/STATUSBAR-NotificationService( 2127): Noti Alert - mSystemReady:true, AlertEnabled:true

D/STATUSBAR-NotificationService( 2127): enqueueNotificationInternal - pkg:XXX.XXXXXXX.XXXXXXXX, id:17301675, tag:null

E/NotificationService( 2127): Ignoring notification with icon==0: Notification(contentView=null vibrate=null,sound=null,defaults=0x0,flags=0x8)

D/STATUSBAR-NotificationService( 2127): Noti Alert - mSystemReady:true, AlertEnabled:true

I//system/bin/fsck.exfat( 4249): fsck.exfat 1.1.0

D/KeyguardViewMediator( 2127): setHidden false

D/KeyguardViewMediator( 2127): setHidden false

D/KeyguardViewMediator( 2127): setHidden false

W/PowerManagerService( 2127): Timer 0x7->0x3|0x0

I/PowerManagerService( 2127): Ulight 0x7->0x3|0x0

D/lights  ( 2127): button : 2 +

D/lights  ( 2127): button : 2 -

D/PowerManagerService( 2127): setLightBrightness : mButtonLight : 0

D/PowerManagerService( 2127): setTimeoutLocked::SmartSleep : after19500

D/STATUSBAR-NotificationService( 2127): enqueueNotificationInternal - pkg:XXX.XXX.XXXXXXXX.XXXX, id:2, tag:null

D/STATUSBAR-NotificationService( 2127): Noti Alert - mSystemReady:true, AlertEnabled:true

D/KeyguardViewMediator( 2127): setHidden false

D/KeyguardViewMediator( 2127): setHidden false

F/libc    ( 8945): Fatal signal 11 (SIGSEGV) at 0x00000008 (code=1)

I/DEBUG   ( 1901): *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***

I/DEBUG   ( 1901): Build fingerprint: 'samsung/m0xx/m0:4.0.4/IMM76D/I9300XXBLG8:user/release-keys'

I/DEBUG   ( 1901): pid: 8945, tid: 8945  >>> /system/bin/fsck.exfat <<<

I/DEBUG   ( 1901): signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 00000008

I/DEBUG   ( 1901):  r0 400aa1b8  r1 00000000  r2 00000000  r3 400a7460

I/DEBUG   ( 1901):  r4 400aa1b8  r5 400901ec  r6 400a96a0  r7 00000000

I/DEBUG   ( 1901):  r8 014d98d0  r9 00000008  10 ffffffd0  fp 00000001

I/DEBUG   ( 1901):  ip 014d18d0  sp be94b878  lr ffffffd4  pc 4008c9a6  cpsr 40000030

I/DEBUG   ( 1901):  d0  3d184240309b4df7  d1  0000000000000000

I/DEBUG   ( 1901):  d2  0000000000000000  d3  0000000000000000

I/DEBUG   ( 1901):  d4  0000000000000000  d5  0000000000000000

I/DEBUG   ( 1901):  d6  0000000000000000  d7  3d24b3bc00000000

I/DEBUG   ( 1901):  d8  0000000000000000  d9  0000000000000000

I/DEBUG   ( 1901):  d10 0000000000000000  d11 0000000000000000

I/DEBUG   ( 1901):  d12 0000000000000000  d13 0000000000000000

I/DEBUG   ( 1901):  d14 0000000000000000  d15 0000000000000000

I/DEBUG   ( 1901):  d16 41ce9259de341893  d17 3f50624dd2f1a9fc

I/DEBUG   ( 1901):  d18 41c84da6fb800000  d19 0000000000000000

I/DEBUG   ( 1901):  d20 0000000000000000  d21 0000000000000000

I/DEBUG   ( 1901):  d22 0000000000000000  d23 0000000000000000

I/DEBUG   ( 1901):  d24 0000000000000000  d25 0000000000000000

I/DEBUG   ( 1901):  d26 0000000000000000  d27 0000000000000000

I/DEBUG   ( 1901):  d28 0000000000000000  d29 0000000000000000

I/DEBUG   ( 1901):  d30 0000000000000000  d31 0000000000000000

I/DEBUG   ( 1901):  scr 00000010

I/DEBUG   ( 1901):

I/DEBUG   ( 1901):		  #00  pc 0000c9a6  /system/lib/libexfat_utils.so (buf_getblk)

I/DEBUG   ( 1901):		  #01  pc 000077c8  /system/lib/libexfat_utils.so (itr_get_next_dentry)

I/DEBUG   ( 1901):		  #02  pc 0000900e  /system/lib/libexfat_utils.so (exfat_check_dir_internal)

I/DEBUG   ( 1901):		  #03  pc 000094e2  /system/lib/libexfat_utils.so (exfat_check_dir_internal)

I/DEBUG   ( 1901):		  #04  pc 000095a0  /system/lib/libexfat_utils.so (exfat_check_dir)

I/DEBUG   ( 1901):		  #05  pc 00009694  /system/lib/libexfat_utils.so (fs_check)

I/DEBUG   ( 1901):		  #06  pc 0000ac2c  /system/lib/libexfat_utils.so (ffsCheckVol)

I/DEBUG   ( 1901):		  #07  pc 0000bff0  /system/lib/libexfat_utils.so (FsCheckVol)

I/DEBUG   ( 1901):

I/DEBUG   ( 1901): code around pc:

I/DEBUG   ( 1901): 4008c984 f8df6821 6019e084 68626820 f8556042  !h.....` hbhB`U.

I/DEBUG   ( 1901): 4008c994 6801000a 60216060 605c6803 68e26004  ...h``!`.h\`.`.h

I/DEBUG   ( 1901): 4008c9a4 609168a1 68a32100 60d868e0 48176872  .h.`.!.h.h.`rh.H

I/DEBUG   ( 1901): 4008c9b4 8014f8c4 61a16122 68004478 f300fa28  ...."a.axD.h(...

I/DEBUG   ( 1901): 4008c9c4 200ef855 0c3ff003 134ceb02 60e36899  U.. ..?...L..h.`

I/DEBUG   ( 1901):

I/DEBUG   ( 1901): code around lr:

I/DEBUG   ( 1901): ffffffb4 ffffffff ffffffff ffffffff ffffffff  ................

I/DEBUG   ( 1901): ffffffc4 ffffffff ffffffff ffffffff ffffffff  ................

I/DEBUG   ( 1901): ffffffd4 ffffffff ffffffff ffffffff ffffffff  ................

I/DEBUG   ( 1901): ffffffe4 ffffffff ffffffff ffffffff ffffffff  ................

I/DEBUG   ( 1901):

I/DEBUG   ( 1901): stack:

I/DEBUG   ( 1901):	 be94b838  00000100 

I/DEBUG   ( 1901):	 be94b83c  400a96a0 

I/DEBUG   ( 1901):	 be94b840  403d1f08 

I/DEBUG   ( 1901):	 be94b844  00005cf7 

I/DEBUG   ( 1901):	 be94b848  be94b954  [stack]

I/DEBUG   ( 1901):	 be94b84c  00000a25 

I/DEBUG   ( 1901):	 be94b850  00000000 

I/DEBUG   ( 1901):	 be94b854  00005cfc 

I/DEBUG   ( 1901):	 be94b858  00000001 

I/DEBUG   ( 1901):	 be94b85c  400870c3  /system/lib/libexfat_utils.so

I/DEBUG   ( 1901):	 be94b860  be94b878  [stack]

I/DEBUG   ( 1901):	 be94b864  400a96a0 

I/DEBUG   ( 1901):	 be94b868  403d1ee8 

I/DEBUG   ( 1901):	 be94b86c  00016a97 

I/DEBUG   ( 1901):	 be94b870  df0027ad 

I/DEBUG   ( 1901):	 be94b874  00000000 

I/DEBUG   ( 1901): #00 be94b878  be94b93c  [stack]

I/DEBUG   ( 1901):	 be94b87c  400a96a0 

I/DEBUG   ( 1901):	 be94b880  00000003 

I/DEBUG   ( 1901):	 be94b884  00000000 

I/DEBUG   ( 1901):	 be94b888  403d1f88 

I/DEBUG   ( 1901):	 be94b88c  be94b93c  [stack]

I/DEBUG   ( 1901):	 be94b890  00005d00 

I/DEBUG   ( 1901):	 be94b894  400877cd  /system/lib/libexfat_utils.so

I/DEBUG   ( 1901): #01 be94b898  400a96a0 

I/DEBUG   ( 1901):	 be94b89c  00000001 

I/DEBUG   ( 1901):	 be94b8a0  00000003 

I/DEBUG   ( 1901):	 be94b8a4  40089013  /system/lib/libexfat_utils.so

I/DEBUG   ( 1901): !@dumpstate -k -t -n -z -d -o /data/log/dumpstate_app_native -m 8945

I/BootReceiver( 2127): Copying /data/tombstones/tombstone_01 to DropBox (SYSTEM_TOMBSTONE)

I/dumpstate( 8952): begin

I/CrashReportBroadcastReceiver( 7291): New report detected, starting reporting service

I/CrashReporterServiceDelegate( 7291): Running task for: SystemTombstone 10 reports (1 per task)

W/AlarmManager( 2127): FACTORY_ON= 0

E/AmazonAppstore.ApplicationHelper( 7291): Received null package name.

D/CrashReporterServiceDelegate( 7291): Processed 1 SystemTombstone report(s)

D/CrashReporterServiceDelegate( 7291): 9 SystemTombstone report(s) remaining

D/CrashReporterServiceDelegate( 7291): Processed 0 SystemTombstone report(s)

D/CrashReporterServiceDelegate( 7291): No reports remaining to process for SystemTombstone, completing task

So it would seem that for now, if you're using the stock ROM, exfat formatting is broken. :(