Usually I just go to the appstore on linux mint, kubuntu has a appstore called discover as for setting up a network drive, I have no idea so I asked meta.ai

Open the File Manager (Dolphin)
Click on Network in the left sidebar
Click on Add Network Folder
Select the type of network share (e.g., SMB/CIFS, NFS, etc.)
Enter the network drive's address (e.g., smb://username@server_ip_address/share_name)
Authenticate with your username and password (if required)
Click Add to mount the network drive

Honestly, tell me if asking AI helps you at all, because I got no idea if it's hallucinating how it should be done.