Dark data is all the information your company stores but rarely uses—think...

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

Dark data is all the information your company stores but rarely uses—think files sitting untouched on old servers. Around 55% of data falls into this category, costing businesses about $2.5 million a year in storage and management