Computer does not recognize the mp3 player

Unpulgged player while it was in the process of synching with Windows media player (it was synching all my potos which i did not want to happen and would take forever anyway). Unit would not power up or be recognized when plugged into PC. Finally I was able to get it back (thansk to a post on this forum), but most content was lost and folders are a little different (all CAPS) and now reads “SANSA CLIPP” and one folder is called “AUDIBLE.”

What happened here and how do I get it back to it’s original state, even if it means wiping memory clean and starting over?