I am a developer with almost 50 years experience (Leo knows this - I've been using DOpus since v1). I understand the logic fully. And I know how to get a directory listing and manipulate it. We are not using computers from the 70s... this is not intense CPU stuff. Having said that, there's a lot of similarly named stuff in here, and I don't live in DOpus settings, so forgive me for having chosen the wrong feature. I bought the upgrade to 13 because two issues I had (not including this one) were suggested to be working in 13, but neither are. So, while exploring new things in 13, I decided I wanted to do this. I woudl have upgraded regardless, but, I was inspired based on expectations to do it sooner.
As for this topic.... the direction of "Use a Folder label" is not sufficient...
Labels > Label Assignments > In Specific Folders
Add Wildcard
Enter folder path wildcard pattern: This might mean F:\ or it might mean ^F:\.+$ I chose the latter, because it is specifially what the prompt is asking. Click OK
Now I see the same requester with a new section below for Assigned Labels.
+New > Wildcard Label
Now it's asking me again for a wildcard... I've already given this. So I guess I should have used F:\ only in last step. There's no need for two wildcards, so I abandon this and start over.
Labels > Label Assignments > In Specific Folders
Add Folder
F:\
Now I'm back where I was a minute ago, but this path makes more sense so far.
+New > Wildcard Label
This is defaulting to "Match Full Path" for the wildcard, though I've already specified the Path specifically, with no wildcard. I turn that off, at this point it should just wildcard the part after F:.
It's also defaulting to "Files and Folders" even though we started this path telling it Folders. so I change that. I set Label to Pinned.
So, I thought, well what happens if I go back the first route I took...
Add Wildcard
Enter folder path wildcard pattern: This time I put F:\
Now I'm back to the same place as the last route. It's got Use Wildcards selected as defaul for the F:. I know now that that is wrong. So I turn that off.
+New > Wildcard Label
At this point, I'm back where I was last path... so I do the same steps.
Now I've got two entries under Folders. Both say F:\ but one has a question mark on the icon. I think they are both the same, but who knows. I delete this one. the other seems like the more correct one.
One can see how very confusing this could be for someone not having used it before.
The end result though... this approach appears to be working.