Dark data is all the information your company collects but never uses—think 55%...

https://source-wiki.win/index.php/The_Fastest_Win_to_Cut_Storage_Costs_from_Dark_Data

Dark data is all the information your company collects but never uses—think 55% of stored data just sitting idle. This unused data costs money to store, creates security risks, and clutters AI systems, making it harder to find real insights