Thank you for the logs.
In the first set, I found what I was looking for.
Aug 09, 2023 21:16:46.785 [140625331116856] DEBUG - Scanner: Processing directory /volume2/Media/TV Shows/Archer (2009)/Specials (parent: yes)
Aug 09, 2023 21:16:46.789 [140625331116856] ERROR - Couldn't get size of file "/volume2/Media/TV Shows/Archer (2009)/Specials/Archer (2009) - S00E04 - Heart of Archness - Part I.mkv": boost::filesystem::file_size: No such file or directory [system:2]: "/volume2/Media/TV Shows/Archer (2009)/Specials/Archer (2009) - S00E04 - Heart of Archness - Part I.mkv"
Aug 09, 2023 21:16:46.789 [140625331116856] ERROR - Couldn't get size of file "/volume2/Media/TV Shows/Archer (2009)/Specials/Archer (2009) - S00E05 - Heart of Archness - Part II.mkv": boost::filesystem::file_size: No such file or directory [system:2]: "/volume2/Media/TV Shows/Archer (2009)/Specials/Archer (2009) - S00E05 - Heart of Archness - Part II.mkv"
Aug 09, 2023 21:16:46.789 [140625331116856] ERROR - Couldn't get size of file "/volume2/Media/TV Shows/Archer (2009)/Specials/Archer (2009) - S00E06 - Heart of Archness - Part III.mkv": boost::filesystem::file_size: No such file or directory [system:2]: "/volume2/Media/TV Shows/Archer (2009)/Specials/Archer (2009) - S00E06 - Heart of Archness - Part III.mkv"
In the 2nd set, it’s more clear .
Unfortunately PMS isn’t printing “Permission Denied” as it used to.
– No such file is an euphemism for “permission denied”.
– It can read the names from the directory but not descend any deeper (the files themselves)
Have you forcibly reapplied permissions (Apply to this folder, sub-folders, and files) for granting permission to the media ?
Synology FAQ - Questions, Answers, and a few How-To's - #37 by ChuckPa
Emphasis on this step: