Samba share on Dolphin is sluggish

Help
1

And I see this in the stderr;

kf.kio.core: An error occurred during write. The worker terminates now. 
kf.kio.core.connection: Socket not connected QLocalSocket::PeerClosedError 
kf.kio.core: An error occurred during write. The worker terminates now. 
kf.kio.core.connection: Socket not connected QLocalSocket::PeerClosedError 
kf.kio.core: An error occurred during write. The worker terminates now.

Operating System: Fedora Linux 44 
KDE Plasma Version: 6.7.4 
KDE Frameworks Version: 6.29.0 
Qt Version: 6.11.1 
Kernel Version: 7.1.8-200.fc44.x86_64 (64-bit) 
Graphics Platform: Wayland 
Processors: 8 × Intel® Core™ i7-7700K CPU @ 4.20GHz 
Memory: 16 GiB of RAM (15.6 GiB usable) 
Graphics Processor: Quadro RTX 4000
2

What is “sluggish” exactly ? Listing ? doing file operations ?

What is the server on the other (for information), Linux or Windows ?