Hello, I just recently switched to osx for the first time with my new rMBP. My question is what is the best, easiest way to make my old 1tb WD external/portable HD work with mac and pc. I wont need to do a lot of swapping between the two, but I would like to maintain my backups from Windows incase I ever need them. I would also like to be able to take advantage of time machine with this HD. Here is what I believe is my best course, and hopefully someone can comment: Partition it into two, one for windows one for mac. Will this work to use time machine on the mac side? Thanks in advance!