Dark data is the information your company keeps but doesn’t use—often 55% of...

https://blogfreely.net/samuel-wang09/what-is-kappa-data-services-and-why-is-it-tied-to-python

Dark data is the information your company keeps but doesn’t use—often 55% of stored data is dark. This unused data takes up space, driving up storage and backup costs, and it can increase your risk of breaches or ransomware attacks