Dark data is all the information your company stores but rarely uses—think...

https://emilyscoolnews.urbanvellum.com/posts/what-is-garbage-in-garbage-out-for-ai-data-pipelines

Dark data is all the information your company stores but rarely uses—think files sitting untouched on old servers. Around 55% of data falls into this category, costing businesses about $2.5 million a year in storage and management