Dark data is the information companies collect but never use, often making up...

https://www.toro-bookmarks.win/dark-data-is-the-inactive-or-unused-information-that-piles-up-in-storage-often

Dark data is the information companies collect but never use, often making up 60-80% of their stored data. This hidden, inactive data can quietly drain storage resources and cost businesses up to $2.5 million a year