Dark data refers to the 55% of stored information that organizations collect...

https://wiki-coast.win/index.php/How_Do_I_Find_Unknown_Departmental_Shares_That_Nobody_Owns%3F

Dark data refers to the 55% of stored information that organizations collect but never use. This inactive data increases storage and backup costs and raises ransomware and breach risks by expanding attack surfaces. On average, companies waste $2