I've been using my flash drive to transport my GT around to my friends house so that I don't have to bog down our play time, but about two months ago I was playing Mass Effect offline and it froze. So in my stupidity I took out the flash drive then turned off my xbox. Ever since I've had to deal with not being able to earn my achievements or have certain activities register, Like the fact that my second most recent game should be CoD BlackOps. Lots of other interesting things happen while I'm playing as well, while playing Halo Reach I get an error message saying that it can't save my options or something to that effect. I'm tired of this dance that I have to deal with as the Law Abiding Xboxer, so any help would be greatly appreciated.