Hi, I have tried searching for what I want to know but I can't find anything. If there is another thread that covers this topic then please redirect me. Anyway... I have 3 macs. My MacBook Pro, an old PowerMac and a Mac mini. I want to have the same music file structure on every machine. And then when I update the music on my MacBook Pro (my main machine) every week or so I can run a backup which updates the folders. Now I have looked at this using Backup with my .mac account and that only creates a file that my other two machines can't use. Also some of the other solutions, i.e. iBackup only appear to be able to complete a whole backup rather than an updated backup. Any help would be great thanks.