There is a tiny white star in the bottom right of one of the folders in the library module

[Boston KC]

There is a tiny white star in the bottom right of one of the folders in the library module. What does that indicate?

[Rikk Flohr: Photography]

The folder has been marked as a Favorite.

Favorite folders can be reviewed by clicking the small down arrow next to the magnifying glass in the Folder search field. 

[Boston KC]

Thank you. I never saw that function on the magnifier glass. But, when I
did that search for Favorite Folders and it showed up in the list, I right
clicked to unmark Favorite Folder and it did not remove the star that
indicates it as a Favorite. No big deal either way. Thanks again for
letting me know what the star was.

[bhousto90]

There is long time feature/bug in the favouriting of folders: a folder can be favourited as a single folder and/or as a multi-folder group. Though it only shows the star once per folder.

You need to unfavourite both the original selected group of favourited folders (i.e A & B) and single folder A favourite in order to completely remove the star from folder A.

Determining which folders comprise the folder group after a length of time can be challenging if you have many favourited folders.

Use the magnifying glass filter to show only your favourites then proceed in multi-selecting folders by trial/error to find original/correct set of favourited folders. The right click menu will show "unmark favourites" vs 'Mark favourite' when you find correct set.

[Boston KC]

I tried your instructions and still no luck. But, it was good to learn so
much about the favorite folders and especially the magnifying glass drop
down to select folders that have been marked with favorite or color. Thanks
for you time and knowledge.