Dark data is the information your company collects but never uses, often making...

https://wiki-site.win/index.php/What_Should_I_Do_with_Former_Employee_Folders_on_the_File_Server%3F

Dark data is the information your company collects but never uses, often making up 55% of stored data. This inactive data increases storage and backup costs and raises the risk of ransomware or data breaches