Dark data is the unused information stored in your systems, often making up 55%...

https://reidyxab469.iamarrows.com/do-i-have-to-move-petabytes-before-i-know-what-i-have

Dark data is the unused information stored in your systems, often making up 55% of all data. It can expose your organization to ransomware attacks and breach risks since it’s unmanaged and unmonitored