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

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

Dark data is the hidden information your company collects but never uses—like old files or unused scans. Around 55% of data goes dark, quietly taking up space and driving up storage costs by millions