Dark data is all the information companies collect but never use—about 60-80%...

https://www.kilobookmarks.win/dark-data-is-the-information-companies-store-but-never-use-often-making-up

Dark data is all the information companies collect but never use—about 60-80% of it just sits untouched. This hidden data piles up quietly, causing clutter and driving up storage costs