Amazon Elastic File System lets you create petabyte-scale file systems that can be accessed in massively parallel fashion from hundreds or thousands of EC2 instances and on-premises servers, while scaling on demand without disrupting applications. Since the mid-2016 launch of EFS, we have added many new features including encryption of data at rest and in transit, a provisioned throughput option when you need high throughput access to a set of files that do not occupy a lot of space, on-premises access via