Your content belongs to you. This is why we make it as simple as possible to migrate your site from our systems to another host. When migrating a site to another host, you need to move two things, your database and your wp-content folder. For access to these files follow our guide on how to manually backup your site.
Please refer to any migration guide your new host may have to properly migrate a site as every host will have a different method.
If you still have questions, please contact us by submitting a ticket via the MyPressable Control Panel.