Comparing files in one folder to those in a drive or a selection of folders

[renébach]

I got conflicting results with the selection assistant. The marking of files for deletion was sometimes OK and sometimes marked the files for deletion that were for me at the "right" place. I am talking about thousands of files.
I need to brake down the process.
One possible solution would be to search duplicates of files in one directory/folder (source) against the files of the rest of the directories/folders/drive.
Would that be a useful feature ?
Or is there already a solution to this problem ?
Cheers

[DigitalVolcano]

You can set folder trees to be 'protected' so they won't get marked.

You can compare one folder against the rest by setting that folder to 'Master' before the scan
https://www.digitalvolcano.co.uk/duplic ... =&sct=OTU=