BF3 MP problems

Everytime I load up Battlefield that I bought 3 days ago it tells me that my player data has been damaged and everything I have unlocked suddenly becomes new and I must scroll over it again to make the triangle go away. Can anyone explain this?

could be your harddrive is going, or you just have bad luck and turn off the xbox when its writing/reading data

It shouldnt be my hard drive, all my equipment was bought brand new 3 months ago when I switched from PS3 and it is nowhere near being out of memory because it had 320 GB, it now has 261