I'm relatively new to this Linux OS. I am not familiar with the command code or what it stands for. What I wanted to ask is I have a 750GB SSD partitioned into 4 ext4 drives. One for entertainment, one for my wife's storage, one for my storage, and one for gaming stuff. They are respectively named as 'Entertainment', Bethy's Drive, Ed's Drive, and Games/Extra. What I would like to accomplish is to allow my wife's account (username bethy) access to do everything to her drive, and also be able to save stuff to Entertainment as well. I would have sole permission to Games/Extra and Ed's Drive. I have given myself owner permission by formatting the drives directly from the desktop since formatting in GPARTED only gave permission to root and made it so I couldn't access them. After I fixed that, I attempted to try and give permissions to user bethy for the two drives named above and I get one of two restrictions.
If the drive is unmounted it asks for my password as authentication as a superuser.
If the drive is mounted, it doesn't even open at all and gives absolutely no response.
Can someone please assist me in understanding what I would need to do to restrict user bethy to the two specific drives? Preferably I would like to restrict access to the main Computer drive as well to only myself, but I have no way of editing those permissions for even myself let alone another user.