How to do the exact opposite of Duplicate Cleaner

[alexvanakker]

I'm using Duplicate Cleaner 4 and very much like the tool.

However, I'm currently looking for a tool that can do the exact opposite:

Scan location A and provide me with a list of all files that do not have a duplicate in a location B.

The idea is of course to check if all files in location A have a backup in location B.

The tools I can find, all want to sync folders but in my case the folder structures in location A & B are very different.

Is this something that can be done with Duplicate Cleaner (don't think so). Does anyone know a tool that can?

[DigitalVolcano]

You can do this using the Unique Files feature.

See tutorial here: Find unique files with Duplicate Cleaner: Comparing drives
https://www.youtube.com/watch?v=lbYFB5w-4nM

[alexvanakker]

Very cool!! Thanks. I'm even more impressed with duplicate file finder.

One additional question though.. The goal of finding unique files would clearly not be to delete them. Is there a way to selects all files for copy to a save location?

[DigitalVolcano]

Yes, you can mark all the files in the Unique tab (right click and select 'Invert marked files') and then use the 'File Removal' window to copy the marked files.