diff --git a/docs/quickstart/backup_to_external_disk.rst b/docs/quickstart/backup_to_external_disk.rst
index f1a02d7..6019bcf 100644
--- a/docs/quickstart/backup_to_external_disk.rst
+++ b/docs/quickstart/backup_to_external_disk.rst
@@ -33,4 +33,17 @@ You will likely want to customize some aspects mentioned in the top comment in t
 
 .. literalinclude:: ../../config/samples/quickstart_backup_to_external_disk.yml
 
+
+Offline Backups with two (or more) External Disks
+-------------------------------------------------
+
+It can be desirable to have multiple disk-based backups of the same machine.
+To accomplish this,
+
+* create one zpool per external HDD, each with a unique name, and
+* define a pair of ``push`` and ``sink`` job **for each** of these zpools, each with a unique ``name``, ``listener_name``, and ``root_fs``.
+
+The unique names ensure that the jobs don't step on each others' toes when managing :ref:`zrepl's ZFS abstractions <zrepl-zfs-abstractions>` . 
+
+
 :ref:`Click here <quickstart-apply-config>` to go back to the quickstart guide.
\ No newline at end of file