Dark data refers to the 55% of stored information that businesses collect but...

https://wiki-byte.win/index.php/How_Much_Enterprise_Data_Is_Usually_Inactive%3F_Understanding_the_60-80%25_Inactive_File_Data_Percentage

Dark data refers to the 55% of stored information that businesses collect but never use. This inactive data poses real risks like ransomware attacks and data breaches since it often lacks strong protection