New Media Source Won't Scan

[TheDreadPirate]

In Windows explorer, bring up the server hosting the network shares. Looks like \\MainPC in this case. Right click on the "Movies 4" network share and "Map network drive". Select a drive letter.

Now in Jellyfin Library settings add the drive letter you assigned to that share.

How is this different? The difference is who is responsible for communicating with the network share. When a network share is assigned a drive letter applications access the files on that network share as if it was a local drive. The application does not need to understand or support SMB. When an application accesses the network path directly the application needs to be able to use the SMB protocol.