Dark data is the inactive info your company stores but doesn’t use—often 60-80%...

https://wiki-dale.win/index.php/What_is_Garbage_In_Garbage_Out_in_AI_Data_Prep%3F

Dark data is the inactive info your company stores but doesn’t use—often 60-80% of all data. It increases risks like ransomware exposure since old files may lack proper security