i still have my original xbox HDD and it works fine, but i put a larger one in and it was working until xbox live tried to update. then i got error 21. so i restored the MS backup and Mod backup and got error 13. so im just trying to re format the drive but windows wont read it and i cant boot games. so how can i re format the drive. P.S. I dont care if i lose anything i just want to delete everything on the drive so i can start from scratch.