Oh wait... i just realized something that should've been obvious when i posted this topic
The Steam folder is 140 GB, the F drive only has 138 GB
...This is gonna be tougher than i thought :(
i know you can do symbolic links on mac, which is how i made steam store all my games on an external hd. maybe there's something similar for windows?
I'm not aware of such a thing, but i don't really know much about advanced computerin' stuffs