Greetings I've recently bought a 1.5 TB My Book Essential external hard drive to back up some data and also to transfer in/out different devices at home. So I have a few questions: 1.- As I expected, OS X told me that it couldn't write to the disk, since the format isn't compatible. This is no problem, as I will be dividing the disk into 2 partitions, and formatting each one, one for my Windows machine, in FAT32 or NTFS, and one for my Mac. Now here's the thing - What format do I choose for the Mac partition? I have several options and don't know which one to choose. 2.- I'm considering to use the drive as an "official" Time Machine drive, instead of just copying files onto it. Now here's the question - How do I make it so instead of it just making different versions of my backup, to it to replace the previous backup each time I do it, so I don't end up with the whole space filled up? I don't need different versions of my backup, I don't do that important work. Your sincerely, ramzhh.