Note that the default video folder created by Synology is for their Video Station application. They have been known to reset file permissions during DSM updates. Something to be aware of if Plex suddenly cannot see the files. See Installation & Setup of Plex Media Server on Synology .
Check the file permissions. In DSM 7, Plex runs under the PlexMediaServer username, which needs at least read-only access to the files.
- Login to DSM. User must have admin rights.
- Control Panel → Shared Folder
- Select the video folder & then Edit
- Permissions Tab. Change Local User to System Internal User.
- For user PlexMediaServer, select Custom
- Type = Allow, Apply To = All
- Check all Read boxes. Check all Write boxes if needed. Done
- IMPORTANT: You should be back at the Permissions window. Check the box in lower left corner to “Apply to this folder, sub-folder, & files.”
- Save & Save.
Plex should now have access to all the files. Scan the libraries to see if Plex picks up any new shows/episodes.
If Plex still does not find the files, then verify naming & organization is following Plex requirements.
See Plex Docs → Your Media → Naming & Organizing Your TV Show Files.
You may need to Plex Dance a show after any renaming/reorganizing.
