Hello Mac Gurus, I have a MacPro tower, latest version, a Macbook (2ghz intel core duo) and a PBG4 (latest model from that family) that I would like to back up onto one volume rather than worry about three separate hard drives. My home network is set-up through an airport extreme base station, so I am inclined to plug in a USB harddrive into that rather than buy a new time capsule unit, unless that is a better option. I am also considering buying a new internal drive for the tower and using it as the back up drive from inside the desktop computer. Currently I have two separate drives connected to the USB and FW800 ports on the macbook and macpro respectively. Of these three options (time capsule, AE w/ USB drive and internal SATA) which is preferable? Is it as simple as partitioning one drive into 3 parts for this operation? Are there other options or concerns I should consider? Thanks for your help in advance.