Dark data is the inactive information companies keep but don’t use—often 60-80%...

https://remote-wiki.win/index.php/Is_It_True_55_Percent_of_Enterprise_Data_Is_Dark%3F_Exploring_Dark_Data_Statistics_in_2025

Dark data is the inactive information companies keep but don’t use—often 60-80% of stored data. It increases storage and backup costs and raises breach risks, like ransomware targeting forgotten files