Dark data is the information companies collect but never use—think old emails,...

https://magic-wiki.win/index.php/148_How_Do_I_Explain_Dark_Data_to_a_CFO_Without_Boring

Dark data is the information companies collect but never use—think old emails, logs, or files tucked away and forgotten. It can make up 60-80% of all stored data, quietly eating up space and slowing down systems. Ignoring it can cost businesses over $2