Storage in the Kubernetes and container world is handled differently than it is with virtual machines (VMs) or other types of infrastructure.
Containerized applications typically scale by running multiple instances of containers in parallel. As a result, you have many more containers running at one time than you would VMs, and the lifespan of any given container instance is typically much shorter—minutes or hours. A running VM, by comparison, might persist for weeks or months. While an application is running in a VM often stores data in the VM, that doesn’t make sense given the ephemeral nature of containers.