I have actually been using double killer pro since its first few version many years ago - its the best dup killr out there, and i have tried all of them mostly.
I fully understand that a folder is just a container (as fat as the user goes anyway), thats not the issue
The issue is - i want to locate folder with duplicated content.
NONE of the 25+ duplicate checkers I have tried will do that, they are all focus on inividual files as I said below.
Thanks for your comment, but I have been doing that and it not efficient, whats needed is a scanner that effecively treats a folder as a archive file and compares that archove to all others ie. thats the simplification.