Why the *requirement* to install a 150+Gb game on the C: drive? A great many people (myself included) have installed small size NVMe SSDs as system disks (e.g. mine is 240Gb). I don't have the space to install on the C drive, given the room that Windows takes up...
Is this something to do with pathing to DRM or game certificates. If so, what needs to be done is for that to be fixed, not to suggest that you should only install the game on the C drive...