Dark data is the huge chunk of company info—often 55% or more—that sits unused...

https://www.mediafire.com/file/mqtoq6v01rngn9e/pdf-24993-68596.pdf/file

Dark data is the huge chunk of company info—often 55% or more—that sits unused and forgotten. It wastes up to $2.5 million yearly on storage and adds risk by cluttering security checks