Dark data is the information your business collects but never uses—often 55% of...

https://seo.edu.rs/blog/dark-data-risks-what-security-teams-worry-about-11142

Dark data is the information your business collects but never uses—often 55% of all stored data. This unused data can increase your risk of ransomware attacks and drive up storage and backup costs, sometimes wasting $2.5 million a year