I'm thinking about getting another hard drive, and I want to migrate my gamertag over to the new one for good. Lets say you buy a new hard drive, but you don't really care to transfer any of your gamesaves or anything, but you do want to keep all of your material from the XBL marketplace. Do you transfer them directly from your hard drive, or since you purchased the stuff from the marketplace, will it let you re-download it from the marketplace?? I've seen where it says "Download Again" after you've purchased it. I was just wondering if microsoft has like a unique ID for your Hard Drive that only makes it possible to re-download things you've purchased from that hard drive? Or Is everything just attached to your gamertag?