From Plex Media Server.log:
Feb 01, 2026 05:42:37.460 [140543381842744] ERROR - [Notify] Failed to add watch for "/volume2/DVR/Music/Tunage zero/Styx/Styx - Crash Of The Crown" (28: No space left on device)
...
Feb 01, 2026 05:48:45.000 [140543386061624] ERROR - [Req#211/Transcode/29yjtd216hr12wlrnxvuv7ww/aafa03c4-7dca-4a7c-bae4-c7681dd4bc1e] [truehd_eae @ 0x7fe86ecf4b40] EAE timeout! EAE not running, or wrong folder? Could not read '/var/packages/PlexMediaServer/shares/PlexMediaServer/AppData/tmp/pms-34e9e33b-7b3e-499b-bdd4-b70031354ec4/EasyAudioEncoder/Convert to WAV (to 8ch or less)/29yjtd216hr12wlrnxvuv7ww_8043-0-0.wav'
This is why you are having trouble playing media when transcoding is necessary. Also why Plex is probably not adding some files to libraries.
You’re still exceeding the number of folders Plex can monitor (mentioned above).
To rectify, perform Synology FAQ 16: Increase the number of folders Plex can monitor.
You have to reboot the NAS after increasing the limit (it is a Synology, not Plex, limit).
