AWS Storage Gateway enables your on-premise applications, including backup tools, to seamlessly use AWS cloud storage. This hybrid cloud storage service can be set up as a virtual tape library (VTL) to help you avoid the headaches of managing tape media, libraries and archive services.
Benefits of using Storage Gateway as a VTL:
Non-disruptive way to switch to cloud backups
Keep trusted backup software in place
Reduce manual effort for backups
Eliminate cost spikes of tape system replacement
Safety of Amazon S3 and Amazon Glacier (designed for 99.999999999% durability)