[VRaptor]

There is a very good tutorial on formatting in the howto section of this site. It is very detailed and walks you thru the process step by step with descriptions and pictures.If you are having problems with corrupted files and suspect you have a hacked player would be about the only reason I can think of to do the format. After formatting, your player will show the true size of the memory chip. Once again though: If it ain't broke don't fix it still applies. Hope this helps.