Dark data is the info your company collects but never uses—think old files,...

https://wiki-wire.win/index.php/Why_Is_Our_Backup_Taking_Longer_Every_Month%3F

Dark data is the info your company collects but never uses—think old files, forgotten backups, or unreviewed scans. It can make up 55% of your stored data, costing you money and posing risks like security gaps