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

https://www.bookmarking-fox.win/dark-data-is-the-unused-information-stored-by-companies-often-55-or-more-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