I've had this game on my secondary drive no issues ever since I did that live stream playing it back in December 2018. I've got a nvme as my main drive for the OS, a SSD for the home folder, and then a mechanical HDD mounted to /mnt/GDrive as my Game Drive for stuff I don't want to put on my SSD. Curious as to why it didn't do it. Do you have the none Home folder for games set as the default in Steam?