Unity building takes too much space

Hi, I'm building a VR game at the moment, and everything was going fine until recently. I started getting errors during the build process saying that I needed more disk space. So I started cleaning stuff out until I had about 4 gigs left of space, which frankly still isn't a lot. Luckily it was enough to get builds running, so I figured it got the job done. Later that day, I was trying to free up more space, until I eventually found the Unity cache in:
Users/[Name]/Appdata/LocalLow/Unity/Caches/GiCashe
I saw that it was 10 gigs worth of sweet space, and deleted it without a second thought, leaving me with 16 gigs at the end of the day.
Flash forwards to today, and I make another build in my VR game, and it takes a while, then never finishes. I check how much space I have and notice it's empty. I checked the path file I gave out earlier, but realized that the GiCache holds nowhere near as much space as 10 gigs. What do I do? How do I stop builds from taking up this monstrous amount of space?

 

Thank you so much!! This helps a lot