I had the same problem. My SSD is constantly full so I bought a cheap external HDD and instead of deleting&redownloading games I just move them between disks.

Saves data and is faster. I’d recommend it.

Definitely recommend roll20. Our group moved there during the lockdowns and we finished one campaign and began another. We played Pathfinder.

There is stuff you can purchase but it’s mostly cosmetics like tokens or dynamic lighting.