Dark data is all the info companies collect but never use. It makes up about...

https://www.save-bookmarks.win/dark-data-is-the-inactive-info-your-company-stores-but-doesn-t-use-often-60-80

Dark data is all the info companies collect but never use. It makes up about 60-80% of stored data and just sits there, costing organizations around $2.5 million every year in storage and management