Low Disk Space

Repost because the last one was marked as spam

I have a Dell 5g 15. I love to play video games and got the computer so I would actually be able to run them. Unfortunately, I have been sorely disappointed so far. I got some new games, obviously, but after waiting several hours for the first couple to download, I decided to not download many more. At this point, I had only bought two games. Then I tried to install one of the games I got a few months ago, to find that after only installing two games, I already was out of the required space. Okay, that's fine. I uninstalled one of my two games to make room. Today, I tried to get Arma III. I have cleaned the disk space, got rid of temporary files, compressed what I can. Not only that, but I completely uninstalled every game I have, except for Far Cry 4. Despite all of this, I am still one thousand MB short of room to download the game. What on Earth is the point of buying a gaming computer if it can't even run two games? Can someone explain this to me? Am I missing something? Am I supposed to buy one new laptop for every new game? What is going on? Again, this computer is brand new. I have barely spent any time with that computer on the internet, and I am actually writing this from a different computer. I have not downloaded any mods on Steam. I have literally one game. My trash bin is empty, my desktop is completely 100% clean. I do not at all exaggerate when I say all I have is one game.