Sure . . . just mount the AirDisk on one of the Macs . . . then drag it into the Login Items pane so it will reconnect automatically at startup. Then set up something to backup the Airdisk to the local Mac HD . . . there are a whole bunch of utilities that will do this for either free or pay depending on what you have. RSyncX will do it for free . . . but there's also Deja Vu and a bunch of other folder synchronizing apps available. On Jan 4, 2009, at 14:01, Andrew Lynch wrote: > Hi Folks, > I am using an Airport Extreme AirDisk to store my iTunes > libraries. Is there a way to back up _from_ an AirDisk using time > machine? Each of my Mac's has large hard drives attached to it for > local backup, and one of them could have airdisk backup duty.