Amazon EBS: Persistent Storage for EC2

Elastic Block Store provides persistent block storage for EC2 instances. Unlike instance store, which is ephemeral, EBS volumes persist even if the instance stops. I learned the hard way to always use EBS for important data. You choose volume types based on performance needs—gp3 for general purpose, io1 for high IOPS. You can take snapshots for backup and create new volumes from snapshots. It's also easy to increase volume size or change volume types without downtime.