Persistent Volume is a type of #202201311647 that hold an actual storage. It will not be under the control of 202201291535 cluster. For it to be effective, it needs to be declared beforehand the 202201311630 that will use it.
For applications to claim the ownership of a storage, they need to declare 202202151907#.
See 202202152045#
Storage Class is a type of #202201311647 that could dynamically create a 202202151901 on demand. It is not under the control of 202201291535 cluster.
Persistent Volume Claim is a type of #202201311647 that help #202201311630 to secure necessary #202202151901. It is under the control of 202201291535 cluster.
Note: If all the replicas dies, all the data could be lost! It is wise to have a 202202151901 so that the data stored does not tie to the lifetime of those pods.