so i have xbox slim w 4gb. and 2 flash drives, a 8 and a 16. i installed the oblivion game fine on the flash drive, the 16gb. but when i try expansion it tells me i need a harddrive...so im like whats going on here.....when i download things from the market it never had any issue on it being a flash drive, so since i bought it outside of market its giving me a problem to install on flash drive..and no i wont dish out 120 bucks for the harddrive. i did that onve on old xbox and it was a waste of money apparently w the new slim. thanks for help guys. sorry if someone had this problem , i searched everywhere and couldnt find any help