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

https://www.bookmarking-fox.win/dark-data-is-the-unused-information-stored-by-companies-often-55-or-more-of

Dark data is all the information companies collect but never use, often making up 60-80% of stored data. This inactive data can cost businesses up to $2.5 million each year in storage and management fees