Dark data is all the information companies collect but never use—think 60-80%...

https://super-wiki.win/index.php/What_Kind_of_Sensitive_Data_Hides_in_Old_Shares%3F

Dark data is all the information companies collect but never use—think 60-80% of stored data sitting idle. It matters because this forgotten data takes up space, drives up costs, and can hide risks. For example, businesses waste around $2