Dark data is the info stored but not used—think files and logs that pile 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 info stored but not used—think files and logs that pile up unseen. Around 55% of it just sits there, costing companies millions and creating noise that clutters AI projects