Issues with install location and file pathing

Hi there

I’ve installed UE5.4 on my E drive (freshly formatted 1TB), everything in installed there (EGS and UE), the vault cache is set to there, but whej i try and download a project (in this case the animation ecosystem for games) it defaults to my C drive.

When I then try to change the target location to anywhere on my E drive, I get the error “path is taken by an item currently installed”, even into a blank folder. It seems like there should be aj easy fix to this, but I have no clue what - any advice would be appreciated.