DaYooper
Headphoneus Supremus
The AK daps like the cards formatted in fat32. They don't come that way. If you have the cards still in the dap then go to settings, system information then you'll see the cards listed. Choose the option to erase card for each one. The dap will erase them then format it into Fat32. Then you can just eject them and copy all your music to them in your computer. I know it's a pita but once they are done that way all you have to do is add things the regular way straight to the dap. After writing to the cards the dap will do a rather long scan process but after that it just scans for new tracks upon startup. I learned all this stuff the hard way. Also to stay away from 1tb cards for the time being.