Dark data is information companies keep but never use—about 55% of stored data...

https://fernandosbrilliantnews.iamarrows.com/what-is-agentic-ai-and-why-does-dark-data-make-it-risky

Dark data is information companies keep but never use—about 55% of stored data goes untouched. This inactive data adds up to a $2.5 million waste on storage and increases security risks