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

https://www.red-bookmarks.win/dark-data-is-the-unstructured-information-companies-collect-but-never-use

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