[Asus Transformer TF700] Moridin:
Sandisk 64GB microSDXC 1 worked now it doesn't...here's a logcat if it helps.

Backing up Sandisk microSDXC 64GB UHS1 card from Sensation to test no TF700T...will update later **Edit**Same story as microSDXC 1...

*Edit* forgot to mention it does work perfectly using sd adapter in dock.

07-21 10:58:35.840 D/dalvikvm(2746): GC_CONCURRENT freed 400K, 51% free 10000K/20295K, paused 2ms+3ms
07-21 10:58:35.840 I/System (2746): Failed to destroy process 2906
07-21 10:58:35.840 I/System (2746): libcore.io.ErrnoException: kill failed: ESRCH (No such process)
07-21 10:58:35.840 I/System (2746): at libcore.io.Posix.kill(Native Method)
07-21 10:58:35.840 I/System (2746): at libcore.io.ForwardingOs.kill(ForwardingOs.java:77)
07-21 10:58:35.840 I/System (2746): at java.lang.ProcessManager$ProcessImpl.destroy(ProcessManager.java:257)
07-21 10:58:35.840 I/System (2746): at com.nolanlawson.logcat.b.a.b(Unknown Source)
07-21 10:58:35.840 I/System (2746): at com.nolanlawson.logcat.reader.LogcatReaderLoader.(Unknown Source)
07-21 10:58:35.840 I/System (2746): at com.nolanlawson.logcat.reader.LogcatReaderLoader.a(Unknown Source)
07-21 10:58:35.840 I/System (2746): at com.nolanlawson.logcat.b.o.a(Unknown Source)
07-21 10:58:35.840 I/System (2746): at com.nolanlawson.logcat.b.f.doInBackground(Unknown Source)
07-21 10:58:35.840 I/System (2746): at android.os.AsyncTask$2.call(AsyncTask.java:264)
07-21 10:58:35.840 I/System (2746): at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
07-21 10:58:35.840 I/System (2746): at java.util.concurrent.FutureTask.run(FutureTask.java:137)
07-21 10:58:35.840 I/System (2746): at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1076)
07-21 10:58:35.840 I/System (2746): at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:569)
07-21 10:58:35.840 I/System (2746): at java.lang.Thread.run(Thread.java:856)
07-21 10:58:35.920 D/WindowManager(226): readLidState, sw:1
07-21 10:58:35.920 D/WindowManager(226): adjustConfigurationLw, config:{1.0 0mcc0mnc (no locale) layoutdir=0 sw800dp w1280dp h752dp xlrg land ?uimode ?night finger qwerty/v/v -nav/v} mLidOpen:1 mHasDockFeature:true mHasHallSensorFeature:true config.hardKeyboardHidden:1
07-21 10:58:35.920 V/TabletStatusBar(418): setLightsOn(true)
07-21 10:58:35.940 I/TextType(553): TextType = 0x0
07-21 10:58:36.090 D/dalvikvm(2746): GC_FOR_ALLOC freed 140K, 50% free 10227K/20295K, paused 51ms
07-21 10:58:36.140 D/dalvikvm(2746): GC_FOR_ALLOC freed 142K, 49% free 10451K/20295K, paused 24ms
07-21 10:58:36.200 D/dalvikvm(2746): GC_FOR_ALLOC freed 143K, 48% free 10676K/20295K, paused 38ms
07-21 10:58:36.250 D/dalvikvm(2746): GC_FOR_ALLOC freed 129K, 47% free 10901K/20295K, paused 25ms
07-21 10:58:36.310 D/dalvikvm(2746): GC_FOR_ALLOC freed 207K, 46% free 11126K/20295K, paused 26ms
07-21 10:58:36.390 D/dalvikvm(2746): GC_CONCURRENT freed 244K, 43% free 11576K/20295K, paused 1ms+14ms
07-21 10:58:36.430 D/dalvikvm(2746): GC_FOR_ALLOC freed 136K, 40% free 12252K/20295K, paused 20ms
07-21 10:58:36.460 D/dalvikvm(2746): GC_FOR_ALLOC freed 23K, 36% free 13160K/20295K, paused 17ms
07-21 10:58:36.500 D/dalvikvm(2746): GC_CONCURRENT freed 3 (Checking)
07-21 10:58:48.130 D/MountService(226): volume state changed for /Removable/MicroSD (nofs -> checking)
07-21 10:58:48.130 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = checking
07-21 10:58:48.140 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_CHECKING dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:48.220 E/Vold (115): /dev/block/vold/179:17 failed to mount via tntfs (Invalid argument)
07-21 10:58:48.230 I//system/bin/fsck_msdos(115): ** /dev/block/vold/179:17
07-21 10:58:48.240 I//system/bin/fsck_msdos(115): Invalid signature in boot block: 0000
07-21 10:58:48.240 I/logwrapper(115): /system/bin/fsck_msdos terminated by exit(2)
07-21 10:58:48.240 E/Vold (115): Filesystem check failed (not a FAT filesystem)
07-21 10:58:48.240 W/Vold (115): /dev/block/vold/179:17 does not contain a FAT filesystem
07-21 10:58:48.240 E/Vold (115): Volume microsd found no suitable devices for mounting :(
07-21 10:58:48.240 D/Vold (115): Volume microsd state changing 3 (Checking) -> 1 (Idle-Unmounted)
07-21 10:58:48.240 D/MountService(226): volume state changed for /Removable/MicroSD (checking -> unmounted)
07-21 10:58:48.240 D/MountService(226): volume state changed for /Removable/MicroSD (unmounted -> nofs)
07-21 10:58:48.240 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = unmounted
07-21 10:58:48.240 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_UNMOUNTED dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:48.240 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_NOFS dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:48.240 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = nofs
07-21 10:58:48.250 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from nofs to checking
07-21 10:58:48.250 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from checking to unmounted
07-21 10:58:48.250 W/ExternalStorageNotification(418): Ignoring unknown state {nofs}
07-21 10:58:48.260 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from unmounted to nofs
07-21 10:58:50.710 D/VoldCmdListener(115): volume mount /Removable/MicroSD
07-21 10:58:50.710 I/Vold (115): /dev/block/vold/179:17 being considered for volume microsd
07-21 10:58:50.710 D/Vold (115): Volume microsd state changing 1 (Idle-Unmounted) -> 3 (Checking)
07-21 10:58:50.710 D/MountService(226): volume state changed for /Removable/MicroSD (nofs -> checking)
07-21 10:58:50.720 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = checking
07-21 10:58:50.720 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_CHECKING dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:50.770 E/Vold (115): /dev/block/vold/179:17 failed to mount via tntfs (Invalid argument)
07-21 10:58:50.780 I//system/bin/fsck_msdos(115): ** /dev/block/vold/179:17
07-21 10:58:50.790 I//system/bin/fsck_msdos(115): Invalid signature in boot block: 0000
07-21 10:58:50.790 I/logwrapper(115): /system/bin/fsck_msdos terminated by exit(2)
07-21 10:58:50.790 E/Vold (115): Filesystem check failed (not a FAT filesystem)
07-21 10:58:50.790 W/Vold (115): /dev/block/vold/179:17 does not contain a FAT filesystem
07-21 10:58:50.790 E/Vold (115): Volume microsd found no suitable devices for mounting :(
07-21 10:58:50.790 D/Vold (115): Volume microsd state changing 3 (Checking) -> 1 (Idle-Unmounted)
07-21 10:58:50.790 D/MountService(226): volume state changed for /Removable/MicroSD (checking -> unmounted)
07-21 10:58:50.790 D/MountService(226): volume state changed for /Removable/MicroSD (unmounted -> nofs)
07-21 10:58:50.790 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = unmounted
07-21 10:58:50.790 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_UNMOUNTED dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:50.790 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_NOFS dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:50.800 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from nofs to checking
07-21 10:58:50.800 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from checking to unmounted
07-21 10:58:50.800 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from unmounted to nofs
07-21 10:58:50.800 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = nofs
07-21 10:58:50.800 W/ExternalStorageNotification(418): Ignoring unknown state {nofs}
07-21 10:58:51.900 D/VoldCmdListener(115): volume mount /Removable/MicroSD
07-21 10:58:51.900 I/Vold (115): /dev/block/vold/179:17 being considered for volume microsd
07-21 10:58:51.900 D/Vold (115): Volume microsd state changing 1 (Idle-Unmounted) -> 3 (Checking)
07-21 10:58:51.900 D/MountService(226): volume state changed for /Removable/MicroSD (nofs -> checking)
07-21 10:58:51.900 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_CHECKING dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:51.900 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = checking
07-21 10:58:51.950 E/Vold (115): /dev/block/vold/179:17 failed to mount via tntfs (Invalid argument)
07-21 10:58:51.960 I//system/bin/fsck_msdos(115): ** /dev/block/vold/179:17
07-21 10:58:51.970 I//system/bin/fsck_msdos(115): Invalid signature in boot block: 0000
07-21 10:58:51.970 I/logwrapper(115): /system/bin/fsck_msdos terminated by exit(2)
07-21 10:58:51.970 E/Vold (115): Filesystem check failed (not a FAT filesystem)
07-21 10:58:51.970 W/Vold (115): /dev/block/vold/179:17 does not contain a FAT filesystem
07-21 10:58:51.970 E/Vold (115): Volume microsd found no suitable devices for mounting :(
07-21 10:58:51.970 D/Vold (115): Volume microsd state changing 3 (Checking) -> 1 (Idle-Unmounted)
07-21 10:58:51.970 D/MountService(226): volume state changed for /Removable/MicroSD (checking -> unmounted)
07-21 10:58:51.970 D/MountService(226): volume state changed for /Removable/MicroSD (unmounted -> nofs)
07-21 10:58:51.970 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_UNMOUNTED dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:51.970 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = unmounted
07-21 10:58:51.970 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_NOFS dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:51.980 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from nofs to checking
07-21 10:58:51.980 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from checking to unmounted
07-21 10:58:51.980 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from unmounted to nofs
07-21 10:58:51.980 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = nofs
07-21 10:58:51.980 W/ExternalStorageNotification(418): Ignoring unknown state {nofs}
07-21 10:58:53.270 D/VoldCmdListener(115): volume mount /Removable/MicroSD
07-21 10:58:53.270 I/Vold (115): /dev/block/vold/179:17 being considered for volume microsd
07-21 10:58:53.270 D/Vold (115): Volume microsd state changing 1 (Idle-Unmounted) -> 3 (Checking)
07-21 10:58:53.270 D/MountService(226): volume state changed for /Removable/MicroSD (nofs -> checking)
07-21 10:58:53.270 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = checking
07-21 10:58:53.270 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_CHECKING dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:53.330 E/Vold (115): /dev/block/vold/179:17 failed to mount via tntfs (Invalid argument)
07-21 10:58:53.340 I//system/bin/fsck_msdos(115): ** /dev/block/vold/179:17
07-21 10:58:53.350 I//system/bin/fsck_msdos(115): Invalid signature in boot block: 0000
07-21 10:58:53.350 I/logwrapper(115): /system/bin/fsck_msdos terminated by exit(2)
07-21 10:58:53.350 E/Vold (115): Filesystem check failed (not a FAT filesystem)
07-21 10:58:53.350 W/Vold (115): /dev/block/vold/179:17 does not contain a FAT filesystem
07-21 10:58:53.350 E/Vold (115): Volume microsd found no suitable devices for mounting :(
07-21 10:58:53.350 D/Vold (115): Volume microsd state changing 3 (Checking) -> 1 (Idle-Unmounted)
07-21 10:58:53.350 D/MountService(226): volume state changed for /Removable/MicroSD (checking -> unmounted)
07-21 10:58:53.350 D/MountService(226): volume state changed for /Removable/MicroSD (unmounted -> nofs)
07-21 10:58:53.350 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = unmounted
07-21 10:58:53.350 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_UNMOUNTED dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:53.350 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = nofs
07-21 10:58:53.350 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_NOFS dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:53.360 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from nofs to checking
07-21 10:58:53.360 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from checking to unmounted
07-21 10:58:53.360 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from unmounted to nofs
07-21 10:58:53.360 W/ExternalStorageNotification(418): Ignoring unknown state {nofs}
07-21 10:58:53.420 D/dalvikvm(2794): GC_CONCURRENT freed 360K, 8% free 10093K/10887K, paused 1ms+2ms
07-21 10:58:54.550 D/VoldCmdListener(115): volume mount /Removable/MicroSD
07-21 10:58:54.550 I/Vold (115): /dev/block/vold/179:17 being considered for volume microsd
07-21 10:58:54.550 D/Vold (115): Volume microsd state changing 1 (Idle-Unmounted) -> 3 (Checking)
07-21 10:58:54.560 D/MountService(226): volume state changed for /Removable/MicroSD (nofs -> checking)
07-21 10:58:54.560 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = checking
07-21 10:58:54.560 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_CHECKING dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:54.620 E/Vold (115): /dev/block/vold/179:17 failed to mount via tntfs (Invalid argument)
07-21 10:58:54.630 I//system/bin/fsck_msdos(115): ** /dev/block/vold/179:17
07-21 10:58:54.640 I//system/bin/fsck_msdos(115): Invalid signature in boot block: 0000
07-21 10:58:54.640 I/logwrapper(115): /system/bin/fsck_msdos terminated by exit(2)
07-21 10:58:54.640 E/Vold (115): Filesystem check failed (not a FAT filesystem)
07-21 10:58:54.640 W/Vold (115): /dev/block/vold/179:17 does not contain a FAT filesystem
07-21 10:58:54.640 E/Vold (115): Volume microsd found no suitable devices for mounting :(
07-21 10:58:54.640 D/Vold (115): Volume microsd state changing 3 (Checking) -> 1 (Idle-Unmounted)
07-21 10:58:54.640 D/MountService(226): volume state changed for /Removable/MicroSD (checking -> unmounted)
07-21 10:58:54.640 D/MountService(226): volume state changed for /Removable/MicroSD (unmounted -> nofs)
07-21 10:58:54.640 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = unmounted
07-21 10:58:54.640 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_UNMOUNTED dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:54.640 D/MountService(226): sendStorageIntent Intent { act=android.intent.action.MEDIA_NOFS dat=file:///Removable/MicroSD (has extras) }
07-21 10:58:54.640 D/ExternalStorageNotification(418): onExternalStorageStateChanged : path = /Removable/MicroSD, newState = nofs
07-21 10:58:54.650 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from nofs to checking
07-21 10:58:54.650 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from checking to unmounted
07-21 10:58:54.650 I/MemorySettings(2794): Received storage state changed notification that /Removable/MicroSD changed state from unmounted to nofs
07-21 10:58:54.650 W/ExternalStorageNotification(418): Ignoring unknown state {nofs}
07-21 10:58:55.800 D/QuickSettingsView(418): onFinishInflate(): check if slider should be shown
07-21 10:58:55.800 V/StatusBar.StereoSepElement(418): HDMI Display NOT connected
07-21 10:58:55.800 D/QuickSettingsView(418): onFinishInflate(): set visibility on entire slider element to GONE
07-21 10:58:55.800 V/NvCPLService(651): handleIntent(): START
07-21 10:58:55.800 V/NvOTAHelper(651): IsBootEvent(): bIsBootEvent = false
07-21 10:58:55.800 V/NvOTAHelper(651): IsAlarmWakeupEvent(): bIsAlarmWakeupEvent = false
07-21 10:58:55.800 V/NvCPLService(651): IsPropSetNeeded(): This is NOT a request to set property NV_STEREOCTRL
07-21 10:58:55.800 V/NvCPLService(651): IsPropSetNeeded(): This is NOT a request to set property NV_STEREOMETHOD
07-21 10:58:55.800 V/NvCPLService(651): IsPropSetNeeded(): This is NOT a request to set property NV_STEREOSEP
07-21 10:58:55.800 V/NvCPLService(651): IsPropSetNeeded(): Need to set property NV_STEREOSEPCHG to 0
07-21 10:58:55.800 D/NvControl_JNI(651): com_nvidia_NvCPLSvc_setProperty(): START, set NV_STEREOSEPCHG to 0, stateId = 1, size = 1
07-21 10:58:55.810 D/NvControl_JNI(651): com_nvidia_NvCPLSvc_setProperty(): could set the property.
07-21 10:58:55.810 D/NvControl_JNI(651): com_nvidia_NvCPLSvc_setProperty(): FINISHED
07-21 10:58:55.810 V/NvCPLService(651): handleIntent(): END