Creative Labs MuVo Mix MP3 Player "blackholes" Questions

Insignia Mp3 player frozen I synced songs from windows media player and everything was fine until I unplugged the usb cord and now it is frozen saying usb connected...ok to disconnect. I tried holding

MY mp3 player says its total space is 0mb and free space is 0mb and there for it will not let me put files on it Check with another computer. If problem solved then its a software/compatibility issue,