add story about file transfer

documentation/stories.md

@@ -66,3 +66,16 @@ This document is meant to explain what should happen when an user is doing XYZ.
 - USER runs `openkubsd apply`
 - extra VMs are removed
 - their disks are removed (USER may be asked)
+
+# Copying a file from VM A to VM B
+
+## Way 1
+
+- USER copy a file from VM A into the dedicated NFS directory
+- on the OpenBSD host, USER copy/move the file between the two dedicated NFS directories
+- USER copy the file from within VM B from the NFS directory
+
+## Way 2
+
+- USER uses ssh from the OpenBSD host to ssh into VM A to copy into a temporary file
+- USER uses ssh to copy the file from the temporary directory to VM B