If you want to delete/wipe the entire player, the empeg site has a "disk builder" utility that will wipe your disk drives from scratch. Although you shouldn't ever have to do this. There are easier ways to solve problems with the player other than formatting it.

You haven't yet given us enough details to really see what's going wrong with the player. Please be more specific about exactly what you're doing and what's happening.

It could be hardware trouble, or maybe it just needs a database refresh or something.