I don't have any < 8gb drives, but my GF has 4 of the things. 1 2gb, and 3 4gb. None of them work. An OCZ Rally and two other 4gb(all ocz). Plus a "sandisk" that I suspect is an Ebay fake. But anyway, they all show up in the XBox, but it says the same thing "The memory unit you inserted isn't...