Well im trying to host World at war zomibes modded

i been watching videos

and it says the world at war must be on a hard drive

i have a harddrive just not enough space on it

so i bought 2 usb flash drives
one of them was a 16 gb
and the 2nd one was a 4gb

the 16 gb was for my mw2 and waw
and the 2nd one was for to saved the game and modd it

so if someone could help me...
my ? is do you have to have waw on the harddrive are could it be on a usb??


please help