Dark data is the information your business collects but never uses, often...

https://messiahssplendidjournals.lowescouponn.com/how-do-i-query-object-store-metadata-in-databricks

Dark data is the information your business collects but never uses, often making up 55% of stored data. It creates storage and backup costs that can reach millions annually and increases ransomware and breach risks by expanding your attack surface