Dark data is the information companies collect but never use—often 55% of...

https://meet-wiki.win/index.php/How_Do_I_Explain_Dark_Data_ROI_to_Finance_and_FinOps%3F

Dark data is the information companies collect but never use—often 55% of stored data. This unused data wastes storage and backup resources, costing millions annually. It also increases breach risk, as hidden data can be targeted in ransomware attacks