Dark data is all the information your company stores but never uses—think of it...

https://www.jelly-bookmarks.win/dark-data-is-all-the-info-your-team-stores-but-rarely-uses-think-old-files

Dark data is all the information your company stores but never uses—think of it as digital clutter taking up space. Around 60%-80% of file data stays inactive, costing you money and creating security risks