IT faces getting rid of all old unused files that are clogging up primary storage. Primary storage can have data on it that has not been modified or even opened for years. The challenge is how do you deal with the digital dump, especially since most IT people don’t have the authority to delete other peoples files. Longer term storage platforms have built in capabilities to verify data integrity for years into the future so at some point it makes sense to move this digital junk to a separate storage platform, designed for the task.”]
Source: https://www.darkreading.com/database-security/cleaning-the-digital-dump