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

https://star-wiki.win/index.php/How_Do_I_Stop_Dark_Data_From_Coming_Back_After_Cleanup%3F

Dark data is all the information your company collects but never uses—think old files, logs, or unused documents. It can make up 60-80% of your stored data, creating extra costs and security risks. Ignoring it means wasting up to $2