Dark data is the 55% of stored information companies keep but do not use. This...

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

Dark data is the 55% of stored information companies keep but do not use. This inactive data not only wastes storage and backup resources, costing millions annually, but also increases breach and ransomware risks by providing unseen attack surfaces