I'm about to reformat my Vista machine with XP 64 however the partitions shown seem to be swapped around, my C: is a 320GB Maxtor and my D: is a 500GB Samsung Spinpoint. The partitions seem to be swapped around, my D: is showing as my 320GB from the size and my C: is showing as my 500GB from the size. Which one should I format? I don't want to lose the data on my SpinPoint as I'm backing up a lot of files from my old installation there.