Back up your Azure App from Azure Portal

In the Azure portal, navigate to your app’s page, select Backups. The Backups page is displayed.
In the Backup page, select Backup is not configured. Click here to configure backup for your app.
In the Backup Configuration page, click Storage not configured to configure a storage account.
Choose your backup destination by selecting a Storage Account and Container. The storage account must belong to the same subscription as the app you want to back up. If you wish, you can create a new storage account or a new container in the respective pages. When you’re done, click Select.
In the Backup Configuration page that is still left open, you can configure Backup Database, then select the databases you want to include in the backups (SQL database or MySQL), then click OK.
In the Backup Configuration page, click Save.
In the Backups page, click Backup.