Dark data refers to the inactive or unstructured information stored but not...

https://uniform-wiki.win/index.php/What_Does_It_Mean_to_Curate_Data_for_AI_Ingestion%3F

Dark data refers to the inactive or unstructured information stored but not used, often making up 55% of enterprise datasets. It increases storage and backup costs and exposes your systems to ransomware and breach risks