I believe your screenshot is showing the interesting file results. Here I’ve got a sample rule that finds files with “bird1” in the name:
That’s not a folder - that’s just all the hits for the interesting file rule. The question seems to be asking how many jpgs are in the actual folder that the interesting file is located in. That will look more like this:
In the tree you’d be under “Data sources” and then the media card. The interesting file should be marked with a yellow triangle in the score column.