'My Music' is your personal music locker. It lists all the tracks and albums you have bought.  If you lose or upgrade your mobile, change your PC, delete tracks by mistake, have a download fail or a track not work properly, you can download them again for free from here up to 4 times (your original download plus 3 redownloads). 'My Music' also lists your credits and their use by dates. On your mobile look for the 'My Music link' at the bottom of the Mobile Jukebox homepage. On the web the 'My Music' link is in the top right corner of the homepage.