Hi Justin, Steam seems to validate your machine using some hardware info as removing or adding even unrelated disks will cause an unlink even if the home directory remains entirely intact, I’m not sure if it’s a bug or intended behaviour but it definitely does happen and why I was hoping just a reformat of the unrelated disk would still pass those hardware checks.

Changing hardware definitely unlinks it as I’ve had to relink it every time I remove or add a hard drive or ssd.

https://www.codeweavers.com/blog/mjohnson/2023/7/13/why-fixing-pooshooter-toilet-invaders-on-proton-was-definitely-not-a-waste