individual files showing in File Explorer instead of just folders

Not a big problem, more of a grievance...

In my library, under videos, I have about 20 folders containing different videos and grouped according to category. If I click on the arrow beside the word videos in the leftmost column, I can see all the folders displayed underneath. All normal behaviour!

If I actually click on the word videos, then I see the same folders listed in the second column from the left, but with all the individual files from one of the folders displayed beneath the list of folders. In the past, I could only see these individual files by clicking on the folder in which they are contained. I can't understand why these files are now listed under the folders (and why just these files and not files from the other folders as well). And I don't know what to do so that I see only the folders and no single files. Any ideas?

Windows version 1903

Are you in a actual LIbrary? Right-clcik ine background of the right=hand pane of Explorer and see if you have the Arrange by > option.

Keith

Thanks Keith. Managed to fix this, but still cannot understand how the situation had arisen. Basically, the individual files listed underneath the folders were COPIES of the files in one of the folders. I simply deleted them once I'd made sure that they were only copies and not linked in some way to the files in the folder itself.

F.