Anders from the Social Care Team here.
Thanks for the question today! There are a couple of ways to back-up your Shopify Store:
1. You can manually back-up your store data by exporting a CSV of your Product details (Products > Export) and you can download your Theme File to your desktop device (Online Store > Themes > Actions > Download File). We also have a guide to this process HERE.
Thanks for the recommendation Anders. We wrote a blog post on why exporting your Product CSV file shouldn't be considered a backup - you can read that post here: https://blog.rewind.io/2017/05/08/3-reasons-your-shopify-product-csv-file-might-not-help-you-when-yo...
Rewind backs up more than just the products and themes. We also backup your collections, product images, blogs, pages and more.
Toan: let me know if you have any questions about backing up your store.