Elastic File System
The Elastic File System (EFS) is a scalable file system for Linux instances. You can attach multiple instances to a single EFS volume so that they can all share the same files. EFS volumes are highly available, spanning multiple Availability Zones in a single VPC. EFS can scale up to petabytes in size without disruption and automatically scales down so you’re not charged for space you’re not using. Unused files are automatically moved to a cost-optimized storage class. For more information, visit https://aws .amazon.com/efs/.