Server Version#: 1.41.2.9200 I run PLEX with 2 music libraries - one on my Mac for local access and one for remote access on my Synology DS420+ NAS. The two libraries have identical content; Synology Drive keeps them in sync via a one-way upload to the NAS when the content on the Mac changes. Bot…

Could be related to how you sync the files to your NAS. The Syno could be triggering the file system events used by the automatic scan too soon, when the copy is still in progress. https://support.plex.tv/articles/201543057-why-is-some-of-my-content-not-found/

I noticed mine quit working a few months ago also. It used to work fine on my Synology, then I guess maybe 2 or 3 months ago it stopped.

Are you also directly syncing files to the library folder ( post #2 )? If not, have you verified the number of monitored folders on your Syno is adequate ( post #3 )?

I’ve tried manually copying single music files directly to the NAS Music folder, but still can’t get an automatic scan. I’m only monitoring 2 libraries, and I’ve made sure that read/write permissions cover all folders, sub-folders and files.

[image] k2xkt: I’ve tried manually copying single music files directly to the NAS Music folder, but still can’t get an automatic scan. If the scan triggers while the file uploads are still in progress, this can result in the files not being cataloged. Best use a „staging folder“ for your uplo…

See my post above, it has nothing to do with the number of folders plex is watching, its the underlying file system limit.

Automatic Scan not working with Synology NAS

Plex Media Server

dbirch April 7, 2025, 11:11am 3

I would also check Synology FAQ - Questions, Answers, and How-To's - #22 by ChuckPa

Topic		Replies	Views
Library Autoscan Not Working Plex Media Server server-synology	5	46	February 26, 2025
Issues with 1) loss of deleted files 2) automatic library scanning Plex Media Server server-synology , library-management	15	128	May 11, 2025
Plex not scanning folder from Synology NAS Plex Media Server server-windows	6	764	August 30, 2021
Turning on Scan my library automatically causes plex to scan nthe same library over and over Plex Media Server server-synology	1	60	November 2, 2022
Auto scanning stopped working on Synology NAS Plex Media Server server-synology	4	189	September 30, 2023

Automatic Scan not working with Synology NAS

Related topics