Dropbox used to have a way to show all the folders and files that are shared. That feature seems to have disappeared. Mystery why they did that. To me, that seems to be basic security functionality. Probably removed from the commercial version and only in the “business” product since business would normally have IT security people who would insist in such a thing. Why “regular” users, who also have security knowledge and experience would not want/demand that is a mystery.
In any event, after a small amount of internet searching, on https://www.dropboxforum.com/t5/Dropbox/Ability-to-Locate-Shared-Folder/idc-p/283887/highlight/true#M50401 I found this gem for use on Mac OSX and Linux/Unix:
grep -r -i –include=”*.dropbox” shared .
I’d show an example of the output, but then I’d be exposing file names which I’d prefer not to!