I didn’t found this issue listed, so hopefully it is not a duplicate.
I run the launcher to install the game and select a non-system drive as a target. However, the installer files are still downloaded somewhere to the system drive (and I can’t even find where). Which is a big issue for me, because I don’t have the necessary space on this drive.
How to reproduce:
Try to install the game to another drive (say, E:). Watch as free space on C:\ is disappearing, while E:\ is not touched.