Yes I did read up on that and tried using Flatseal for permissions granting, but it didn’t work so I didn’t troubleshoot it very far before doing to the .deb install

That may be an old issue, but I just set up a couple of NTFS drive Steam libraries on Linux last week and it didn’t give me any errors or warnings about the drive format. But I did have big issues with the Flatpak edition of Steam - it couldn’t even write to a local second ext4 partition. Had to switch to .deb Steam install to fix all that