I like this guide! However, I keep running into an Operation not permitted error when attempting to change the ownership to the plex.plex group. I've run into this a few times and cannot seem to get around it.
EDIT: Got it working, though still running into an operation not permitted error. Though, I unmounted and remounted the drives changing the uid to a new mount point. Plex is able to see the files now!
Now to start messing with docker...
EDIT 2: Short lived, changes revert after reboot and have to remount again with changes.
Just reinforcing the do first, apologize later mentality. They'll get away with as much as they possibly can, then drop an "I'm sowwy" like a BP CEO in South Park.
So happy this ethical hacker was looking after small companies like McDonald's. This really could have caused them to go under