I just bought a 3 Tbyte USB drive. I’d prefer for it to have 1 partition, and to be able to back up both XP and Win7 machines to that one partition. But as far as I can tell, there’s no way to do that-- different drive formatting is required for XP and Win7. So my next choice is to have two partitions (each less than 2 Tbytes), and back up the XP machines to one and the Win7 machines to the other. But I haven’t been able to find directions on how to do that-- the sequence of formatting and partitioning. Can someone point me to directions on how to do that (or, worst case, tell me it can’t be done)?