[sasl]

I do this, alongside a tool for finding duplicate files: https://github.com/adrianlopezroche/fdupes.

[reflexing]

I use Czkawka recently for dupes (it has GUI and well-maintained): https://github.com/qarmin/czkawka

[lwerdna]

Thank you. I'm also looking for a tool which will find when one file contains a scaled image in another file, or is a crop of another.