When I found out that Xbox 360s are USB compatible I put in my 8gig USB drive and configured it. I selected customize and reserved 2gigs for xbox use, as I did not have much fee space. Then, I emptied some of my music out by plugging it into the PC and deleting old music, so now I have another 2gigs free. So how do i re-cuztomize it so I can use that extra 2gigs on the card for the Xbox 360 to download things off the Marketplace?