Quick question: I have an external HD enclosure with my HD from my old windows machine in it. I can view all of the files, etc on my mac. The file structure is a mess, but I can find what I need on it. Unfortunately, I can't write to it from my mac. Can anyone help me out? Ideally, I'd like to go through and keep certain files from that drive and then be able to use it to back up other stuff off my mac. What do I need to do to the drive to make that happen? Does it have to get reformatted?