Dark data is the information companies store but never use. It can make up...

https://wiki-stock.win/index.php/How_Much_of_Enterprise_Data_Is_Usually_Inactive%3F

Dark data is the information companies store but never use. It can make up 60-80% of all data, quietly taking up space and resources. Ignoring it costs businesses an average of $2.5 million every year in wasted storage and missed opportunities