Dark data is the information your company collects but never uses. It can make...

https://extra-wiki.win/index.php/What_is_a_Global_Namespace_and_Does_It_Help_with_Dark_Data%3F

Dark data is the information your company collects but never uses. It can make up 55% of your stored data, leading to wasted costs on storage and backup. Plus, keeping this unused data raises your risk of ransomware attacks and breaches