I have had several issues with the SanDisk class 10 sd/sdhc/sdxc ! I have gotten it to register and work for a short period of time to just keep failing and no longer mounting and or only showing empty folders and dumping a ton of files in my lost.dir. Works fine on my Note 10.1, and PC. I have tried formatting with CWM, mini tool, and gparted with the same results. This is just my experience with that SD card and device, however, I have read other posts with users experiencing similar issues so I believe it's a compatibility issue.