This is actually a Windows issue for some who change the location of the MS Store to go to another location.
What I would do if I were you, since your C: drive is limited space:
Scenario One:
- You will need to move all apps the Store has installed to your F: - back to C:
- Change the MS Store app to point back to C:
- Uninstall MSFS
- Difficult one… make sure all apps/programs are off of you F: - then format that one
(If you don’t get every MS Store app moved from there, Windows will give an error on next restart)
Scenario Two:
- Leave all your existing MS Store apps on F:
- Change the MS Store app to point back to C: (for new apps)
- Uninstall MSFS
To have MSFS installed on your F:
- Download from MS Store as usual - this time it should go to C: as you’ve changed the MS Store location.
- Launch MSFS and the installer will give an option where to put the files. This time choose F:\MSFS (create this folder before you launch)
To have MSFS installed on your C (default):
- Download from MS Store as usual - this time it should go to C: as you’ve changed the MS Store location.
- Launch MSFS and the installer will default to the C: drive
There will be files on your C: (about 8-10GB) but the rest of MSFS will be on F: (including the Community folder which now not have all that Windows 10 app permissions).
Am I now really confusing you? 