I started this thread because I was having an issue where Plex wasn't showing the folders on xfs formatted drives which I never resolved. During the last week I've replaced two drives in my system, one after a having it RMA'd and the second being a 4tb WD Red to replace an ancient 1tb Green. I put both drives in the system, formatted them to ext4, mounted them and then shared both at the / level just like all the other drives in my system. My Windows computer sees the drives perfectly, I can create directories and move files to and from both drives using Windows as well as Rsync which i used to move my TV shows to the new 4tb Red.
When I went into plex to add the location to my library, I ran into the same issue as before when I go to select the folder with my media, Plex just shows nothing when I select either of these last drives unlike the others which show the files/folders within.
I'm leaning towards a permissions issue but I have no idea how to go about trying to resolve that as I haven't had this issue on the other drives and I didn't set any special permissions on them.