Dark data is the information companies store but never use—up to 55% of all...

https://www.emergbook.win/dark-data-refers-to-the-inactive-or-unused-information-stored-in-your-files-and

Dark data is the information companies store but never use—up to 55% of all stored data just sits there. This hidden stash matters because it adds to storage costs, risks data breaches, and clutters AI projects with useless noise