Dark data is the info companies keep but never use—think old emails, documents,...

https://stateofseo.com/what-does-agentless-really-mean-for-storage-analytics-tools/

Dark data is the info companies keep but never use—think old emails, documents, or system logs gathering dust. It can be 60-80% of all stored data, silently costing businesses up to $2.5 million a year in extra storage and management