Dark data is the information your company collects but never uses—often making...

https://highstylife.com/why-do-rag-pipelines-get-worse-when-you-add-more-documents/

Dark data is the information your company collects but never uses—often making up 55% of stored data. This unused data not only wastes storage and backup costs but also increases risk, like ransomware targets hidden in forgotten files