Alright, I have a MBP and several windows boxes. I don't own an external, but have several large internal drives kicking around. I know that Time Machine requires HFS. My question is this: is there any way for me to use one of these drives for Time Machine? I can plug the drive into a windows box, but obviously Time Machine can't use it (I get a "failed to create backup volume" error). Is there some way I can format the drive to HFS while it's plugged into a windows machine, and enable it for use by Time Machine? I could buy Time Capsule, but I'd like to use one of the internals I already have instead of spending money if possible. Any help would be appreciated.