Dark data is the information companies collect but never use—like old files,...
https://wiki-saloon.win/index.php/How_Does_Apache_Iceberg_Fit_into_File_and_Object_Metadata_Tables%3F
Dark data is the information companies collect but never use—like old files, emails, or logs. Studies show 60-80% of stored data sits inactive, costing businesses up to $2.5 million a year in wasted storage and management