QNAP Remove Duplicate Files Application Suggestion

Hi

I have a QNAP ts-453be.

I should admit I'm a data hoarder.
Making various data backups and have duplications everywhere.

What's the best duplication removal software can you suggest that can be installed on QNAP with web UI so that I can compare pictures (in case the automated way stuff up), files in the right manner?

And ideally for the software to be able to move them to the new locations so that all is tidy moving forward too.

Thanks