You with other versions you can go into the preferences and set the data folder for a different drive, for Gamepass that option is missing at the moment, I believe it was the same for last years too. So once we start adding graphic packs in the C drive gets full :(
Not sure why it would be...
I came here for this exact thing. It's going to mean a full computer wipe and a bigger ssd if I can't do this.
Either that or buy the game on steam which I don't want to do haha