Updated Plex server on Synology NAS, can't access media files

[ChuckPa]

Thanks for confirming.

I have seen DSM updates forget the permissions for System Internal User PlexMediaServer.

If you follow the How-To

Synology FAQ - Questions, Answers, and How-To's

FAQ 29 - DSM 7 - Give PlexMediaServer access to your media When you migrate to DSM 7, are installing a server for the first time, or just adding a new shared folder / sub-folder for media , folks forget to read the popup at the end of every installation which tells them about how to set permissions. This FAQ shows in detail how to do what those instructions state. When might you need to perform these steps? When upgrading, changing permissions from Plex to PlexMediaServer is overlook…

… making certain to “Apply to this folder, sub-folder and files” as you do, it’ll set them again as they should be.