Almost every IT organization has old data that they want or must keep, but are struggling with where to keep it. The ability to identify, automatically move and transparently recall data could make file virtualization the ultimate cloud gateway. File virtualization software manages the physical aspects of the storage infrastructure behind the scenes. The transparent movement of data is typically used to move inactive data off of primary storage and onto second or third tier forms of storage. For example you could clear out your expensive tier 1 NAS storage of inactive data and put it on a system that had power managed storage.”]
Source: https://www.darkreading.com/database-security/file-virtualization-the-ultimate-cloud-gateway-