If you have an Android phone and you're worried about losing all those songs you bought with the Amazon MP3 app, MP3Tunes is here to save you. MP3Tunes, which has heretofore been relegated as a piece of software for PCs only, now has an app on Android that lets users back up their music to remote servers.
That makes it easier to not only save those precious MP3 files, but also eliminates the hassle of transferring the files from the phone to a computer which involves cables and/or microSD card adapters, and who wants to deal with that?
MP3Tunes also lets users playback their stored collections on any Internet-connected device like an iPhone or iPod Touch (however, Apple restrictions prevent iPhone owners from being able to upload their music collections).
The service is free for anyone storing up to 2 GB of music, and there is a $40/year option for those who want up to 50 GB.