Dark data is the information your company collects but doesn’t use—often 55% or...

https://www.bust-bookmark.win/dark-data-is-the-information-stored-but-not-actively-used-often-making-up-55

Dark data is the information your company collects but doesn’t use—often 55% or more of stored data. This inactive data increases storage and backup costs and raises breach risks, including ransomware targets hidden in forgotten files