Dark data is all the information your team stores but rarely uses—up to 80% of...

https://zandersexcellentblog.quillnesty.com/posts/why-is-our-backup-taking-longer-every-month-unpacking-the-impact-of-data-sprawl-and-dark-data

Dark data is all the information your team stores but rarely uses—up to 80% of it can sit inactive. This hidden data drives up storage costs, creates security risks, and clutters AI projects with useless noise