Dark data is the information your company collects but never uses—often 55% or...

https://speedy-wiki.win/index.php/What_is_the_Real_Cost_of_a_Data_Breach_in_2025%3F

Dark data is the information your company collects but never uses—often 55% or more of all stored data. This unused data takes up space, drives up storage costs, and creates security risks