Dark data is the inactive or unused information sitting untouched in your...

https://www.runway-bookmarks.win/dark-data-is-the-information-your-company-collects-but-never-uses-about-55-of

Dark data is the inactive or unused information sitting untouched in your systems—often making up 60%-80% of your stored files. It matters because it wastes space, drives up costs, and creates noise that can confuse AI projects