I have a 1 TB HDD almost dedicated to steam and other games (Theres some other stuff on there but not much) Also have a 250GB SSD which is just OS and Steam (And a few programs but they dont take much room)
I have a 1TB HDD just for steam and any non-steam games. I keep crap off of my OS SSD. So I have certain drives for certain things. For example, I have another 500GB WD for recording. I tend to keep any classics installed always. (Like KOTOR, GTA:SA etc). I uninstall crap games or games I haven't played in quite some time.
You're not Master Race until the Gaben reveals himself before you. ALL of himself. https://www.youtube.com/user/PCGamingMasterRace87/videos