Okay so I got a 64gb class 10 micro SD card and put it in my phone and it was working well for a while with music and movies. My internal storage ran out on my phone so I thought I should transfer all data to the SD card making it the default storage for my phone (I did this through the storage settings on my phone) so my phone restarted and since then it will not read my SD card at all. Everything else reads the SD card fine, my MP3 player, my other old phone my PC etc. Other SD cards work in the phone too. I tried formatting it with Panasonic formatter and still nothing. Even tried formatting in the phone. When I insert it, it says blank SD card in notification asking me to format. Can someone please help because I really need this to work!