Dark data is the information your business collects but never uses, with 55% of...

https://atomic-wiki.win/index.php/Dark_Data_vs_ROT_Data_%E2%80%93_What_Should_I_Delete_First%3F

Dark data is the information your business collects but never uses, with 55% of stored data often going untouched. This inactive data not only wastes money on storage and backup—sometimes more than $2