I'm currently in the middle of backing up all my music, because my friend, who had a massive more amount of music (A good 20 gigs or so) just had his harddrive wiped by a virus or somethig like that, and he lost all his music, and now I'm paranoid. Also, If I'm ever going to somplace like school or the library or work or something, I never bring my original cd, it's always a copy.