Add a note about best practice for choice of a backup store.

Signed-off-by: James Munson <[email protected]>

content/docs/1.6.0/best-practices.md

@@ -95,7 +95,7 @@ If you're using `ext4` as the filesystem of the volume, we recommend adding a li
 
 ## Volume Maintenance
 
-We highly recommend using the built-in backup feature of Longhorn.
+We highly recommend using the built-in backup feature of Longhorn.  A backup can be saved to an object store (S3, Azure, etc), to an NFS server, or to a SMB/CIFS server, although an object store is the preferred method.
 
 For each volume, schedule at least one recurring backup. If you must run Longhorn in production without a backupstore, then schedule at least one recurring snapshot for each volume.