At the time of writing this, there didn't seem to be a simple way of backing up data from Sanity.io. I thought there would have been a simple UI in the Admin backend that allowed you to download a compressed data version, but sadly, there is not.

After a quick investigation, I discovered that the easiest way to do this is via the 

The Sanity CLI allow you to export your Dataset to a local file using the command line.

1. Install the Sanity CLI (if not already installed)

Category: Sanity.

Backing up your Sanity project