Dark data is the information companies collect but never use. It can be as much...

https://www.pfdbookmark.win/dark-data-is-the-information-your-company-collects-but-doesn-t-use-or-manage

Dark data is the information companies collect but never use. It can be as much as 60-80% of all data stored, quietly taking up space and costing money. On average, businesses waste around $2.5 million a year managing this inactive data