I just got a Samsung pro micro SD card 64gb, when I put it in it reads the card and tells me how much space is on the card around 64gb. When I tried to save a picture or file it always fails to save, then I tried to create a folder in the SD card and I also got a failed to create. I also tried formatting the SD card with this tablet and got the same results. What can I do? Or do I have a defective SD card?