Dark data is the information companies collect but never use, often making up...

https://quebeck-wiki.win/index.php/What_Is_the_Fastest_Way_to_Spot_Files_Not_Accessed_in_Years%3F

Dark data is the information companies collect but never use, often making up 60-80% of their storage. This inactive data takes up space and costs money—businesses can waste around $2.5 million each year managing it