I just updated my PMS on synology yesterday and ran into that permissions issue.
I was keeping my media in the Plex Default Folder, and its permission was set to “Custom”
so I changed that to R/W. Everything went back to normal
But later I decided to create a separate share for my media (which was also recommended by Plex), and now I wanted to know, what should I do about the Plex Default folder permissions ?
Does it need to go back to Custom, or R/W or R/O ?