Dark data is the 55% of stored information that companies collect but never...
https://wiki-nest.win/index.php/Tiering_vs_Archiving_%E2%80%93_What_Is_Safer_for_Inactive_Data%3F
Dark data is the 55% of stored information that companies collect but never use. It creates extra storage and backup costs and increases the risk of ransomware attacks since unused data often lacks strong protection