Forgive me if this has been answered before, I searched for a solution. I can read the SD card fine in a USB card reader. I thought I had already solved this problem last night. My Coby tablet saw the card and all files correctly, then today I turn on the tablet and back to blank or unsupported. (Same SD card, no changes made to it, no updates, I did not touch the SD card once my tablet read it again. I tried to format the card yesterday on the Coby but it removed nothing. Any advice or troubleshooting help? Thank you.