If you are not familiar with the kubectl command, check out my article Getting Started with kubectl.

A persistent volume (PV) is the "physical" volume (such as a hard disk drive or solid state drive) on the host machine (node) that stores your persistent data, whereas a persistent volume claim (PVC) is a reference to a persistent volume, used by a pod.

The kubectl get storageclass command can be used to list the storage classes that have been created.

~]$ kubectl get storageclass
NAME            PROVISIONER              RECLAIMPOLICY   VOLUMEBINDINGMODE      ALLOWVOLUMEEXPANSION   AGE
csi             efs.csi.aws.com          Delete          Immediate              true                   33s
gp2 (default)   kubernetes.io/aws-ebs    Delete          WaitForFirstConsumer   false                  20d