Dark data is the information companies collect but never use. It can make up...

https://future-wiki.win/index.php/Why_Is_Metadata_Tagging_a_Big_Deal_for_AI_Search%3F

Dark data is the information companies collect but never use. It can make up 60-80% of all stored data. Holding onto this unused data costs businesses up to $2.5 million each year in storage and management expenses