After the Mac OS Catalina update, when I plug-in my external drive and try searching with Spotlight there are no results from the external drive.

After the Mac OS Catalina update, when I plug on my external drive and try searching with Spotlight there are no results from the external drive. I tried going to System Preferences > Spotlight and checked the Privacy list, the drive was not listed there. I read that I can add (+) my external drive there and then remove it (-) so that Spotlight can start searching in that drive. Well, when I press "+" and select my external drive all I get is "Privacy List Error: The item couldn't be added or removed because of an unknown error."

What can I do about that Spotlight problem with external drive?

Also, previously when I drag my folders from the drive to the left Favourites section in Finder the folders disappear after I remove the drive, logically, but they are back there when I plug-in the drive again.

Well, now with Catalina, when I do all that, after I plug the external driver back in the folders are not showed in Favourites and I have to do it again manually...Any ideas?

Thanks.