Dark data is the info stored but never used, costing businesses millions and...

https://xeon-wiki.win/index.php/What_Is_%E2%80%9COrphaned_Data%E2%80%9D_and_How_Do_I_Find_It%3F

Dark data is the info stored but never used, costing businesses millions and cluttering systems. About 55% of data warehouses hold dark data, which can increase storage costs and create risks like compliance gaps