Dark data is the untouched information stored in your systems—up to 55% of all...

https://www.sierrabookmarking.win/dark-data-is-the-inactive-information-companies-store-but-rarely-use-often

Dark data is the untouched information stored in your systems—up to 55% of all data goes unused. This matters because it racks up costs and creates risk, especially when AI sifts through cluttered files