Dark data is the 55% of stored information companies keep but never use. This...

https://direct-wiki.win/index.php/Why_Keeping_Dark_Data_on_Flash_Storage_Is_a_Bad_Idea

Dark data is the 55% of stored information companies keep but never use. This unseen data racks up unnecessary storage and backup costs, sometimes totaling millions annually. It also raises breach risks since overlooked files can hide ransomware threats