Dark data is all the information companies collect but never use—like old files...

https://wiki-fusion.win/index.php/What_is_Orphaned_Data_and_How_Do_You_Deal_With_It%3F

Dark data is all the information companies collect but never use—like old files and logs. It makes up 60-80% of stored data and can cost businesses up to $2.5 million a year just to keep