Dark data is all the information companies collect but never use. It often...

https://www.play-bookmarks.win/dark-data-is-the-55-of-stored-information-organizations-keep-but-never-use

Dark data is all the information companies collect but never use. It often makes up 60-80% of stored data. This unused info wastes storage space and can cost businesses up to $2.5 million a year in unnecessary expenses