Stig When in Tonfotos, I click on a new folder, and it starts to scan..on progress bar down to leftside and click another folder and it starts to scan..
Obvously program is checking every change you do on disk, and it will refresh every folder you visit. Without that your index might get outdated and that could lead to all sorts of bad issues. However, that is happening very fast, literally less that 100ms per folder. I am very surprised you actually notice that in your status string, since status sring only get refreshed once per 300ms, scanning task should be finished by then.
You are probably right, the issue is with NAS deleays. I also use NAS, but I don’t have issues like that. Can you please check download speed between your PC and NAS? Is this gygabite connection or less?