My 64GB ultra micro sd developed this problem too, i tried everything and still can’t find a solution. It started about 5 monthes ago i was watching a video on my Galaxy note 8.0 and suddenly the the tablet closed everything and said the memory card is corrupted. I couldn’t access it until i restarted my note then it started functioning normally. I noticed the problem afterwards when pics and songs disappeared after i moved them into it and things i delete are brought back. Since then I’ve been trying every way possible to format it but nothing worked.
I too wanted to share my story so that nobody else buys it until a solution is found.
I didn’t use it that long almost for only a year or less but because i bought it earlier before using it i couldn’t use my warranty any more.
