As Ghost(Pro) is a managed service, you don’t need to worry about data backups—we've got you covered!
If you need to export your data for any reason, you can grab a quick export of your content, members, themes, and post analytics from Ghost admin — read more about generating exports of your data.
If you'd like a full site archive, including images, contact support@ghost.org and we'll send you a link to download your full site archive.
Outside of using the on-demand export options, developers can utilize the Admin API and Content API to write scripts and pull down data to be stored locally or on your own server.