Dark data is all the unused information companies collect but never analyze or...

https://collinscoolthoughts.raidersfanteamshop.com/what-is-rot-data-and-how-is-it-related-to-dark-data

Dark data is all the unused information companies collect but never analyze or use. It can be huge—about 60-80% of data sits inactive, hidden away. That unused data costs businesses up to $2.5 million a year in storage and management fees