Corrupted files preventing me from dragging files to and from my mp3

It all started when i tried to drag a song onto my mp3, at first it said it was already in use and then it worked. After that, when i tried to listen to music it would freeze up when i went to a song that was near the songs i had just put in. A couple of days later, the mp3 would skip the corrupted songs and would work perfectly, sadly, i can’t put or take out any songs from the mp3.

Is there some way, that i could wipe the hard drive to get rid of the corrupted song or is there another way to fix the problem.

My mp3 is a:

model:m240

1 GB

Any suggestions???