Dark data is the inactive or unused information that accumulates in your...

https://lukasnpyy234.cavandoragh.org/gartner-may-2026-agentic-ai-storage-report-what-does-it-mean-for-us

Dark data is the inactive or unused information that accumulates in your systems—often 60-80% of stored data. It poses real risks like ransomware exposure and breach vulnerability since outdated files may lack current security controls