Wondering how to go about setting up an external HD to archive files for both Mac and PC. I have a Maxtor Onetouch plus 4, 500gb (price $130). I have two Mac Minis (Leopard), an Ibook G4 (Tiger), and two PCs (XP). Not sure how to go about formatting, should I use FAT32 and then just do a manual archiving of files for all these computers, or setup partitions and then (I hope) use some backup software? Is this the best drive for this purpose?