I just purchase a new xbox 360 about a month ago. I sent the 360 to get modded but I was told that this particular drive could not be flashed. So I purchase a different drive and sent it to get flashed. When I received it yesterday I installed it and it said System Error E66. So then I took the drive off and put it on my brothers 360 which is modded and the flashed drive that was flashed did not work on his. By me installing the flashed drive on my 360 did the drive get unflashed or corrupted. What can I do. Should I purchase an old 360 version.