Dark data is the info companies collect but never use. It can be 60-80% of...

https://wiki-fusion.win/index.php/What_is_Orphaned_Data_and_How_Do_You_Deal_With_It%3F

Dark data is the info companies collect but never use. It can be 60-80% of stored data, sitting idle and forgotten. This unused data wastes storage space and drives up costs—some firms lose about $2.5 million each year managing it