Do not use the default Synology folders. This will cause issues. Synology may reset file permissions at seemingly random intervals. This can happen even if you do not have the Synology applications (Video Station, etc) installed.
See Installation & Setup of Plex Media Server on Synology for information on how to organize your media.
Note: Not that you are, but never use the Plex shared folder for your media. Doing so will definitely cause problems when running DSM 6 (things change for DSM 7).
That is the wrong way to organize your media and may cause problems. Plex does not like such subfolders.
For example, given a folder structure:
/media
../movies
..../vol1
..../vol2
The Plex movie library should point at vol1, vol2, etc, not at movies. You can add multiple folders to a library.
Make sure you follow Plex naming requirements. Also, it is recommended that you place each movie in its own folder, ex: ../Avatar (2009)/Avatar (2009).mkv. It will speed up library scanning when adding new media, as Plex will scan just the additions, not the entire library. Also, if you wish to add extras, trailers, etc, individual folders are required.
The ability to add the IMDB/TMDB, etc ID came with the new Plex Movie agent and scanner, which is now the default for new libraries.
The Plex Movie agent/scanner will see the ID in the folder/file name and use it to match the media. See the previously linked support docs for details. Look in the Naming & Organizing Your Movie Files and Naming & Organizing Your TV Show Files for details.
Example:
../Avatar (2009) {imdb-tt0499549}/Avatar (2009) {imdb-tt0499549} [1080p].mkv
- Note the curly brackets.
- If there is other info you want in the file name, put it in square brackets. Plex will not use it for matching & metadata retrieval.
