Dark data is the information companies collect but never use. It can make up...

https://www.web-bookmarks.win/dark-data-is-all-the-stored-information-companies-forget-about-or-never-use-in

Dark data is the information companies collect but never use. It can make up 60-80% of all stored data. Holding onto this unused data costs businesses up to $2.5 million each year in storage and management expenses