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

https://dantevrib041.fotosdefrases.com/what-should-i-track-monthly-to-prevent-dark-data-from-creeping-back

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