I have recently turned my Synology back on after a few months in storage. All data is still on there and available when connected via laptop. When I log into plex I can see a friends share, but I cannot see an option for my Synology anywhere, so I cannot use it to watch my own files.
I’ve searched high and low and cannot find a way of adding the NAS or switching to it. I can only see my friends share.
Make sure the Plex Media Server process running. Check Package Manager.
Can you connect directly to the server: http://pms_ip_address:32400/web/index.html
Try Synology FAQ #25. You must be on the same network as the Plex server when claiming it.
Also, the version of PMS you are running is a year old. Consider manually updating to the current release. Download the current version from plex.tv/download, then manually install using the Package Manager. See Synology FAQ #2, #3, & #3a.
I forgot to mention yesterday that my NAS is now attached to a mesh wifi disc, rather than the main router for the house. Will this impact anything at all?
I’m updating the package and going through the rest of your comments now.