Dark data is the information companies collect but never use—like old files,...

https://www.strobe-bookmarks.win/dark-data-is-the-info-companies-collect-but-never-use-often-making-up-60-80-of-1

Dark data is the information companies collect but never use—like old files, emails, or logs. Studies show 60-80% of stored data sits inactive, costing businesses up to $2.5 million a year in wasted storage and management