Dark data is all the information a company collects but never uses. It makes up...

https://juliet-wiki.win/index.php/Why_Does_Dark_Data_Matter_for_AI_Projects%3F

Dark data is all the information a company collects but never uses. It makes up 60-80% of data stored, quietly taking up space and costing businesses up to $2.5 million every year in wasted storage and management