Dark data is all the information a company collects but never uses. It makes up...

https://www.bookmark-fuel.win/dark-data-is-the-information-companies-collect-but-never-use-it-s-estimated

Dark data is all the information a company collects but never uses. It makes up 60-80% of data stored, quietly taking up space and costing businesses up to $2.5 million every year in wasted storage and management