Dark data is the information organizations collect but don’t use, often making...

https://www.pop-bookmarks.win/dark-data-is-the-55-of-stored-information-companies-don-t-use-but-still-pay-to

Dark data is the information organizations collect but don’t use, often making up 55% of stored data. It increases storage and backup costs and raises breach risk by expanding the attack surface for ransomware