What's the story with Windows and big disks? Specifically, Windows 7 and a 3tb drive. I've read what Microsoft and others say about using large drives with Windows 7. I gather it works. However, I haven't found a how-to guide that actually spells out how to get the thing done. In my case, it would not be the boot drive. I'd boot off an SSD and use the 3tb drive for storage. How can I do a clean install on that? I've tried and Windows doesn't see all of the 3tb drive. (The GPT format option is greyed out.) Then, if I get Windows to recognize the 3tb drive, can I partition it into multiple logical drives? So, for example, the SSD would be C: and I'd split the big drive into D: and E: . Doable?