Now I got to back up the MacBook to a new external USB drive, my next quetions would be partitioning. The previous external USB Drive I used had two partitions, Windows and Mac accessible, but on each partition on the same external drive. I had not issue for the at lease six times I have accessed this drive. Now I got a more portable drive and just have the Mac access to it. Has anyone had issues with using same drive for Windows (NTFS or FATS) and Mac (Mac OS Extended Journaled)? Any complication s to look out for, or, is it not even advicable? I need to do it again since 1T drive is really too lard for my Mac backup. Would like to backup twi iPhones and a MacBook Pro to the Mac partition. Then backup just the two iPhones to my PC and back that up to the Windows partition on the same external USB drive. Thanks.