Your system information

• Steam client version (build number or date): 1705108172

• Distribution (e.g. Ubuntu): Ubuntu 22.04.3 // I don't remember how I installed steam but the Steam package from the official repository of Ubuntu was not installed, I guess it was directly from valve?

• Opted into Steam client beta?: No

• Have you checked for system updates?: Yes

• Steam Logs:
  steam-logs.tar.gz

• GPU: Intel (Embedded in CPU)

Please describe your issue in as much detail as possible:

The screenshots: https://imgur.com/a/Fbau5Jm
I expected that when you press the button for adding a new steam library folder the list of drives should also include network file systems' mount points in the list, but it was not in the list, so I had to choose "let me choose another location", but when I chose that, the next window that popped up was just a dummy window with no function, Nothing happened when I click NEW FOLDER, or SELECT.

In the end I had to make a library folder in another drive and then shut down steam and then move the new steam library folder to the desired location in the network file system, and then manually change the path of the drive in ~/.steam/root/steam/steamapps/libraryfolders.vdf to the new location.

Steps for reproducing this issue:

1. Go to Settings
2. Click Storage tab
3. Click the drive that is currently chosen, and then choose Add Drive

Thank you