Butter thats th glory of these things you get attached as you keep playing........
1. reformat the card start over if you do not mind losing all the junk...
2 if you need the stuff use a card reader open up the main folder
dcim. is the main folder
you'll see subfolders named here
one is the camera and the other mp3 if you do not see the mp3
A. open hte camera up go to the mp3 and try playing or hit play then go back and open it up via usb cable or card, now you have a mp3 folder there store all your mp3's there and all shall play
what happs you need this folder it may or may not say you needa folder in the book and that is your trouble