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

https://wiki-spirit.win/index.php/Can_I_Really_Tag_Petabytes_of_Files_with_Custom_Python_Metadata%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