Same issue here - https://forum.pso2.com/topic/2784/unable-to-change-install-location/7
Converse with fellow players
I want to install PSO2 on my D drive but even after following all the microsoft forum posts, PSO2 remains the only game on the MS store that refuses to get installed anywhere except for C drive.
It's only PSO2 that has this issue as I'd installed Killer Instinct on my D drive just a few days prior.
Anyone else with this issue + know a workaround?