Dark data is the info companies collect but never use—like old files or logs....

https://wiki-legion.win/index.php/How_Do_I_Report_on_File_Age,_Owner,_and_Last_Access%3F

Dark data is the info companies collect but never use—like old files or logs. Up to 80% of stored data can be inactive, creating storage costs and security risks. It also clutters AI systems with useless noise, making insights harder to get