EBS volume intro

 EBS Volume: it's a network drive(i.e not a physical drive)

• It uses the network to communicate the instance, which means there might be a bit of latency.
• it can be detached from an EC2 instance and attached to another one quickly.

it's locked to an Availability Zone(AZ)

• An EBS volume in US-east-1 a cannot be attached to US- east 1b
• To move a volume across, you first need to snapshot it.