Pete

<p><strong>Note: Obsolete since WordPress 4.4</strong></p>
<p><a href="https://core.trac.wordpress.org/ticket/32230" rel="nofollow ugc">This feature has been added into the core of WordPress 4.4</a>. You can now export your attachments by going to Tools->Export and select ‘Media’ as the export type.</p>
<p><strong>Original Description</strong></p>
<p>WP Attachment Export allows you to export your media library into a WordPress eXtended RSS or WXR file. You can then use the Tools->Import function in another WordPress installation to import the media library.</p>
<h4>Issues / Bug reporting</h4>
<p>Found a bug? Please use the issue tracker at <a href="https://github.com/thehelvetian/wp-attachment-export/issues" rel="nofollow ugc">https://github.com/thehelvetian/wp-attachment-export/issues</a></p>
<h3>Usage</h3>
<p>User <a href="https://wordpress.org/support/profile/philho" rel="ugc">PhiLho</a> has put together a good summary on how to use the plugin at <a href="https://wordpress.org/support/topic/good-but-could-use-more-explanations" rel="ugc">https://wordpress.org/support/topic/good-but-could-use-more-explanations</a>. Thanks PhiLho!</p>


WP Attachment Export

works perfectly.

Exports only posts of type 'attachment', i.e. your media library

lahrah

<p>After installing and activating the plugin, the XML file is generated simply by visiting your site’s front page. The file generates each time someone visits your site’s front page. This shouldn’t be an issue with server overload, unless you get a LOT of traffic. If you notice slowness due to this plugin, let me know.</p>
<p>The XML generated will be located in a folder called ‘xmlfiles’ within your wp-content folder. The file will be named multipost.xml.</p>
<h3>Issues</h3>
<p>1) None yet.</p>


XML-ify WordPress Multiple Posts

This plugin generates an XML file using content from multiple blog posts. You decide how many of the latest posts you want included in the XML file.

WP Attachment Export vs XML-ify WordPress Multiple Posts