The Synology drive is at 192.168.1.9 on my local network. This is how it is under Plex. Are you saying that I need to have /volume1/Synology Media/Music as my paths within the m3u file?
I have scanned my music library under Plex several times as well as run a few Refresh Metadata scans to alleviate the issue where tracks didn’t have a title. Fixed that though.
