If the machines are networked all the disk format issues go away as the networking software handles all that. I think Wkraft was talking about connecting the external USB drive directly to both a Mac and a PC for backup purposes. If that's the case, my post above applies.
Herman, there used to be major issues with the way Macs handled FAT32, but I've found OSX 10.3 and above to be rock solid.
Herman, there used to be major issues with the way Macs handled FAT32, but I've found OSX 10.3 and above to be rock solid.