Dark data is all the info companies keep but never use—think old files, emails,...

https://echo-wiki.win/index.php/Why_Do_AI_Agents_Get_Worse_When_They_Search_Old_Folders%3F

Dark data is all the info companies keep but never use—think old files, emails, or system logs. It makes up 60-80% of stored data but sits idle, costing businesses up to $2.5 million each year just to store and manage