Questions about Time Machine for Apple Mac? 1. When i use time machine, my computer will be backed up on the hard drive multiple times. but Will i still be able to copy files likes movies onto my hard drive since i need extra storage for my mac? 2. I have it formatted to fat32, so that i can transfer files to my windows pc. When i try to set up time machine, it asks me to reformat the HD. my question here is after reformatting, will i be able to use my hard drive to transfer files from windows to mac and vice versa???? transfering files was one of the reasons i got a external HD. 3. How fast will my hard drive fill up if its a 500gb external HD, and my mac HD is like 100gb???