[Doc Source]: access the pool from outside the cluster

[AuqW9cQ]

Are you proposing new content, or a change to the existing documentation layout or structure?

Unfortunately, I cannot find any information on how to access the data from outside the cluster.

I already have applications running that currently use NFS shares for the persistent data, if I switch to Mayastor, how do I get them onto the new persistent storage?

How can I edit configuration files that are in the Mayastor pool or backup it?