Dark data is the unused information sitting in your servers and storage—about...

https://www.a1bookmarks.win/dark-data-is-all-the-info-your-company-collects-but-never-uses-up-to-55-of-it

Dark data is the unused information sitting in your servers and storage—about 55% of data companies hold stays untouched. It matters because it drives up costs, creates security risks, and clutters AI projects with irrelevant noise