Steam Missing File Privileges & pfx is not owned by you
I've been having some problems with sharing my games with another user on the same computer
I've setup an account for him so he could play my games without fiddling with anything on my own account, so I put all of my games on my 2nd 6TB HDD, which is currently mounted on /mnt/newhdd/, and after that, I created a group called "steam", added both users to it, changed ownership of that HDD to the Steam group with sudo chown -R :steam /mtn/newhdd/
and sudo chmod -R 770 /mnt/newhdd/
to make sure both users had permissions and privileges to use, write and execute the folder
But then, there's this issue where every time I reboot, the chmod/chown permissions reset back again, and I have to retype the commands all again to fix the problem, otherwise, Steam keeps giving me the "missing file privileges" error, not allowing me to download or update games
And no, my HDD is not an NTFS, it's an ext4
There's also the problem that if a user download some specific games, the other won't be able to run it unless they re-download it on their own user
Trying to start those games will always give an error amongst the lines of "pfx is not owned by you", and usually deleting the pfx folder specified will allow the user to play the games, but this is far from ideal
What can I do about all of this, if anything at all?
I just want to share my games with another user on my computer, simple as that.