If you have installed Plex Media Server on your Windows computer, you add shares on your NAS this way:
Surf to the media on your NAS using the Windows file explorer:
click into the address bar of file explorer once and press CTRL+C to copy the so-called ‘UNC path’ into the Windows clipboard.
Then switch into Plex Web and create a new library. (or edit an existing one)
On the ‘Add Folder…’ tab, click on ‘Browse for Media Folder’
in the resulting window, delete everything from the address bar (topmost)
then press CTRL+V to paste the previously copied ‘UNC path’ to your media into the address bar
click ‘Add’
click ‘Add Library’
done.
Tip # 2
Bring user accounts on file server/NAS and your Plex server machine into sync.
i.e. if you are logging in to your plex server with a certain user name and password, create the same user (using the same password) on your NAS device.
This approach is much more reliable than telling Windows to store the access credentials to your media file share.
Particularly if you’re running PMS as a Windows service, maybe even under a different Windows user account than what you’re regularly using.
