Dark data is the information your company collects but never uses—like old...

https://foxtrot-wiki.win/index.php/How_Do_I_Get_Visibility_Into_Data_Across_Storage_Silos%3F

Dark data is the information your company collects but never uses—like old files hiding on servers. Around 55% of stored data is dark, which means you’re paying to keep it safe but getting no value