Amazon Elastic File System (Amazon EFS) is a file storage service for Amazon Elastic Compute Cloud (Amazon EC2) instances.
Amazon EFS is easy to use and provides a simple interface that allows you to create and configure file system quickly and easily.
With Amazon EFS, storage capacity is elastic, growing & shrinking automatically as you add and remove files, so your application have the storage when it needs and remove the extra storage when it does not need it.