Because of files on it. I never specified I was storing just music files onto it, it was assumed. My mp3 player is basicly an external HD as I said. It plays music, videos, pictures, w/e and it shows up as an external HD on my computer and everyone elses computer. I not only store media files onto it, I also store password files, school project files for backup purposes, saved files for programs, information about my accounts to various websites, anything file that I want. And if someone steals my mp3 player>they get info to all that which>I do not want to happen. You will probably say "well then don't store that info on ur mp3 player", and I would say that I feel safer storing that info so that I can remember it on that instead of writing it down where I can lose it, or keeping it on this computer which can be hacked.