Before I upgraded to Catalina (MacOS 10.15.5), Dropbox appeared under my favorites in the sidebar of Finder. After the upgrade, it was gone. I've searched many threads where this is apparently a common issue but the solutions appear to be for earlier versions of MacOS as the view I am seeing under Catalina does not match the solutions. I understand folders can be dragged to the sidebar. The problem is, I am not seeing the folder on the right, in order to drag it into the sidebar. I tried the "go to folder" but it only navigates to the files within the folder - it never shows a folder labeled Dropbox. I have the Dropbox App installed but it isn't helpful either as when I click on it, it opens a Dropbox window that, again, shows the files I have stored there. I want to be able to easily move files to Dropbox or access them to attach to an email, as I could before I "upgraded" to Catalina (which is starting to feel distinctly like a downgrade).