AWS EFS vs EBS vs S3 (differences & when to use?)

Question

As per the title of this question, what are the practical differences between AWS EFS, EBS and S3?

My understanding of each:

• S3 is a storage facility a

Answer 1

Fixing the comparison:

• S3 is a storage facility accessible any where
• EBS is a device you can mount onto EC2
• EFS is a file system you can mount onto several EC2 instances at the same time

At this point it's a little premature to compare EFS and EBS- the performance of EFS isn't known, nor is its reliability known.

Why would you use S3?

• You don't have a need for the files to be 'local' to one or more EC2 instances.
• (effectively) infinite capacity
• built-in web serving, authentication