MrClass wroteNot sure how plausible this might sound. You can try purchasing a slim external 2TB HDD, open the case, take the hard drive, and install it in your laptop.
MrClass's idea is the way to go. though it is quite risky and if you mess it up, your screwed cause warranty is probably thrown out the window the moment you crack that thing open, so take note of that. you shouldn't have any problems though since as far as i know, external hard drives are just normal hard drives with casing and an adapter so yeah...