S3 backups

Good morning,

I've just tested using Perch built in backups for a customer on staging at the moment (we usually use a third party service). All working great but I notice the task isn't backing up resources (just the database). I presume this is because there have been no changes to assets since I set it up (as it backs up on a rolling basis). Is there any way I can force an initial backup of the resources that are already in Perch?

Perch Runway: 3.0.12, PHP: 7.1.12-1+ubuntu16.04.1+deb.sury.org+1, MySQL: mysqlnd 5.0.12-dev - 20150407 - $Id: b396954eeb2d1d9ed7902b8bae237b287f21ad9e $, with PDO
Server OS: Linux, fpm-fcgi
Installed apps: content (3.0.12), assets (3.0.12), categories (3.0.12), root_analytics (2.0.0), perch_blog (5.6.1), perch_forms (1.10), root_heartbeat (1.0.1)
App runtimes: <?php $apps_list = [ 'perch_blog', 'root_analytics', 'perch_forms' ];
PERCH_LOGINPATH: /admin
Image manipulation: GD Imagick
PHP limits: Max upload 100M, Max POST 100M, Memory: 512M, Total max file upload: 100M
F1: 3b606135b33e6a102526838f4152a807
Resource folder writeable: Yes
REQUEST_URI: /admin/core/settings/diagnostics/
SCRIPT_NAME: /admin/core/settings/diagnostics/index.php

Thanks, Lea.