Using Dropbox Business, just under 1TB of data online, different folders shared with different users/groups.
Recently I created a new Team folder and copied the contents of a large Shared folder to it. Objective is to properly manage permissions for users viewing and accessing all the subfolders.
My oversight was to make the folder names very similar. Users began copying working files into the new Team folder before I was ready to do a cut-over, ugh. I chatted with Dropbox support & asked if there was any utility to do folder comparison, but they said there's nothing native to Dropbox environment for that, unfortunately.
Did some searching, ran across a utility called Beyond Compare by Scooter Software, which will do file/folder/image comparisons between two locations. It also has an API for Dropbox. Downloaded the 30-day trial, connected to my Dropbox account online, and it's showing ALL the ~20k files for each of my two folders in question, everything color-coded and very easy to tell what's missing in which folder. Don't need to have the folders all downloaded locally, it's running the comparison on my online folders. AMAZING tool, very happy to have stumbled upon it.
Just thought I'd share my experience
Pete