Dark data is the information companies collect but never use—think old files,...

https://felixssuperperspective.brightsora.com/posts/how-do-i-build-a-dark-data-cleanup-plan-that-legal-will-approve

Dark data is the information companies collect but never use—think old files, emails, and logs cluttering servers. Around 55% of data sits inactive, driving up storage costs and creating security risks