Dark data is the information companies collect but never use—often 55% of...

https://www.cast-bookmarks.win/dark-data-is-the-inactive-information-your-business-collects-but-never-uses-it

Dark data is the information companies collect but never use—often 55% of stored data. This unused data wastes storage and backup resources, costing millions annually. It also increases breach risk, as hidden data can be targeted in ransomware attacks