Why is it saying there is not enough space???

Literally, I’m trying to download the latest version of unity but I “don’t have enough space” when there is loads of space, can someone explain.

are all your hard drives completely free? because sometimes the extra features you try to download automatically download to a specific place. If this doesn’t work just clear up more space because there is more to download then you see there

I downloaded unity hub on my E drive and there is loads of space in there.