Hello guys i dont know if im doing anything wrong but i cant actually play halo4 it keeps disconecting me , i think i need a bigger hard drive as i only have a 4 gb xbox slim but im unalbe to do anything . 
not impressed so far it wont even let me use my external hd so i think im -Yoinked!- for now then
I read somewhere that you can just get a 8GB USB drive to go with your 4GB slim and it should work fine. Not sure whether this is accurate though.
You could always just buy a laptop hard drive and put it in the bottom of your Xbox 360 Slim. Don’t listen to the guys at GameStop who tell you that you can’t do it - you can, it’s cheap, and it takes about 3 seconds.