Finder - Awkward icons
I copied a folder (including a few folders and files) from an external HDD to another external one. After copying process was finished, I had my original folder copied on the destinatio HDD, but I saw that some of the folder names (inside the folder) had an awkward icon at the right (as you can see in the image I pasted in this mail) . This icon is generally visible only when the copying process is running. Anyway I cannot get rid of it. Can you understand what's happening? Thanks.
MacBook Pro 15″, OS X 10.11