Dark data is the info companies store but never use—think of old files or...

https://sierra-wiki.win/index.php/How_Do_I_Report_on_File_Age,_Owner,_and_Last_Access%3F

Dark data is the info companies store but never use—think of old files or unused backups. It can be up to 55% of all stored data, quietly costing millions and creating risks like security gaps