Mainly for my Arcade Games and for my Games on Demand (GoD). I now have like 7 GoD's and a lot of Arcade games. And I also have old XBOX Originals titles (3 of them, Halo: CE, Ninja Gaiden Black, and BLACK). My question is this: Can I just buy say a 120-250GB HDD for the system and bring my profile over and download them onto the HDD?