it would be much harder to do that then just plug it in xbox and put files on it you would need to get files on your xbox like hotswapping them on there or modchip should work but hotswap is free but much harder modchip is one time install just if you get a modchip you need make sure its off when you get on xbox live or your ****ed banned! so try to get files on comp then put on your usb from there but you still would have to do it again on other xbox you wanna put stuff on