Archivarix

Archivarix External Images Importer will scan your posts and pages for external urls in src/srcset attribute for all img tags. Based on configured settings it can:
<ul>
<li>Download images from their external locations</li>
<li>Download images from Internet Archive (Wayback Machine)</li>
</ul>
You can choose what to do with images that could not be retrieved from external sources.
For further information and instructions please see <a href="https://archivarix.com/en/wordpress/" rel="nofollow ugc">Archivarix WP Plugin</a>

Archivarix External Images Importer

Works great!
I imported several posts into a site running WordPress 5.9.3 with Gutenberg and the Archivarix External Images Importer plugin imported the external images without any issues. I've tested a few other image importer plugins but none of them had the ability to scan a site and import from existing content like this one does.

Works with Gutenberg

Import external images in posts and pages from its original external sources or Web Archive if original source is unavailable.

OnionBazaar

Backup & Restore Manager will back up your entire WordPress website including your database and all your files, manually or on a custom schedule.
Backup & Restore Manager is a fork of the popular backup software <a href="https://wordpress.org/plugins/backupwordpress" rel="ugc">BackUpWordPress</a> by HumanMade, which seems to be discontinued unfortunately. We continue maintenance and have extended the plugin with the ability to upload backup files and an automated restore feature.
If you are already using BackUpWordPress, switching to Backup & Restore Manager will retain all your settings, schedules and backups (and vice versa).
For support, head over to the <a href="https://wordpress.org/support/plugin/backup-restore-manager" rel="ugc">WordPress Support Forum</a> or <a href="https://onionbazaar.org/?p=help" rel="nofollow ugc">https://onionbazaar.org/?p=help</a> for direct support.
This plugin requires PHP version 5.3.2 or later
<h4>Features</h4>
<ul>
<li>Simple to use, no setup required</li>
<li>Works in low memory, “shared host” environments</li>
<li>Manage multiple schedules</li>
<li>Option to have each backup file emailed to you</li>
<li>Uses <code>zip</code> and <code>mysqldump</code> for faster backups if they are available</li>
<li>Works on Linux & Windows Server</li>
<li>Exclude files and folders from your backups</li>
<li>Simple upload and restore of your backups</li>
</ul>

Backup & Restore Manager

Simple automated Backup and Restore of your WordPress Website.

Archivarix External Images Importer vs Backup & Restore Manager