I tried to download Unity 2018.1.0f2 many times and all the times I got an error (the problem is described in this thread https://forum.unity.com/threads/cant-install-unity-2018-1-0f2-through-the-unity-hub.529471/). And I noticed that after each unsuccessfull download space on hard drive decreases. I suppose that there are some files left and I'd like to remove them, but didn't find what folder Unity Hub downloads files to. Does anybody know something about it?
A bit late reply, but they are located under your AppData folder (C:\Users\[...]\AppData\Local\Temp). There should be a bunch of unityhub folders there.
Are they all safe to delete? Most seem to be installer files for Unity itself or some related packages. There's "UnitySetup64-2021.3.10f1", "UnitySetup-Universal-Windows-Platform-Support-for-Editor-2021.3.10f1", "UnitySetup-WebGL-Support-for-Editor-2021.3.9f1" some Visual Studio installer called "vs_Community" and even some Unity documentation. All useless?