Dark data is the information your team collects but never uses. It can make up...

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 the information your team collects but never uses. It can make up 55% of your stored data, leading to wasted storage costs and security risks. For AI projects, dark data adds noise that slows results and hurts accuracy