It is an Incremental Backup - If the first Backup taken some Files then one Further Backup only the New Files are Backup not all again

Amazon S3 Outposts delivers object storage to your on-premises AWS Outposts environment. Amazon S3 Outposts is designed to store data durably and redundantly across multiple devices and servers on your Outposts. It works well for workloads with local data residency requirements that must satisfy demanding performance needs by keeping data close to on-premises applications.

EFS - Elastic File System Multiple instance can access the data in EFS at the same time It is a Scalable file system used with AWS Cloud and on-premises Resources

EBS Volumes are attach to EC2 Instance Availability Zone level resource Need to be in Same AZ to Attach the EBS to EC2 Instance If the Volume is Full it Would not Scale up the Storage Volume - Automatically Store data in Single AZ EFS Multiple Instance reading and writing simultaneously Linux File System Regional Resource Automatically Scales Store data in Multiple AZ Can Access On-premises Servers With the help of AWS Direct Connect

Relational Database Management System AWS Suppoted Database are MySQL, PostgreSQL, Oracle, Microsoft SQL Server

Relational Database System Automated patching Backups Redundancy Failover Disaster recovery

It is managed Serive that come in two form MySQL, Postgre SQL It is five time faster than the standard MySQL & Three time faster than Postgre SQL It Reduce cost by reducing the Unnecessary I/O It Replicate six copies of your data to three AZ Continuously Back up data to S3

It is a Serverless Database It has milisecond respond time It is the Non-Relational Database & NoSQL database service that allows you to develop modern applications at any scale