In one sentence
Choose S3 for objects, EBS for instance-attached blocks, EFS for shared Linux files, and FSx for specialized managed file systems.
Key points
- S3 uses an object API, scales broadly, and is not a normal mounted disk.
- EBS is block storage tied to an Availability Zone and commonly attached to EC2.
- EFS is a regional shared NFS file system for Linux workloads.
Exam takeaway
FSx provides managed file systems such as Windows File Server, Lustre, NetApp ONTAP, and OpenZFS.