i would use this opportunity, like PP said, to get a nice 128gig ssd. save up for a bit and buy your self an external Hard drive, later on.
i bought my Samsung 830 128gig SSD for $70, my 128gig, after installing windows 8, has 101gigs of space left, enough for 5 or 6 full fledged modern games at about 20 gigs each. there are tons of great deals like that out there, just gotta look for them. and you can get a 1tb external hard drive for under $100 all day long from any etailer.
i just built my new computer with my ssd and i kid you not, no exaggeration, my computer starts in 11 seconds, from the time i push the button on the case to i am in a booted usable OS, that means opening files and launching the internet. 11 seconds.