When I use Dolphin to open a share on my NAS a folder called CAG7VG-Z shows up. Whenever I select it I get the error message that the file or folder does not exist. This folder does not show up on my other systems (mac,windows and linux mint), or in the terminal both in my CachyOS system or in the root shell of my nas (Truenas custom built). What is going on ?
interesting when used the smbclient program the miscreant folder did not appear, so it looks like something Dolphin is doing. here is a screen shot. The folder CAG7VG-Z only appears on dolphin and it wont let me delete it there
This looks like a temp folder or something.
Can you try clearing the KDE/KIO SMB cache.
I think you should mount the share via CIFS instead. Then edit fstab so it auto mounts each reboot.