My iMac runs Catalina and I've noticed a problem. I have numerous video files on external hard drives. Some of them have aliases with the same name that are not linked to the video itself, and I cannot delete the alias. I cannot drag the files into the trash. I cannot fix the alias by assigning it to any video, even the one of the same name. I cannot rename it. If I open "get info" I can't change the permissions. Anybody have any thoughts? I've searched this out via Google with no resolution. Thanks.