Create full backup and publish the site

Hi Guys

Thanks for reading my question.

I am new to web deploy and want to see how I can use Web deploy to Create a full back up of my website before publishing it.

I did try the steps mentioned at

https://docs.microsoft.com/en-us/iis/publish/using-web-deploy/web-deploy-automatic-backups

but I noticed that the snapshots zip file only has the two XMLfiles (Archive.xml and systemInfo.xml), not my website contents

Can someone please help me back up my website.

I am using VS 2017 community edition.