https://support.cornershopcreative.com/support/solutions/articles/43000143346-installing-media-deduper-free
4 Steps to Installing the Media Deduper Free Plugin : Cornershop Creative
Find out how to download, install, and activate Media Deduper Free and start using the plugin on your WordPress site to clean up files in your media library.
steps tothe mediafree plugininstallingdeduper
https://www.rainstormtech.com/text-deduper
Text Deduper
textdeduper