myCloud Desktop was not developed to serve as a way to backup your computer. The main aim of myCloud Desktop is to make your files available on all of your end devices. This enables you to access and edit your files on multiple devices anywhere, anytime.
Should you wish to use myCloud as a backup, we recommend going with a myCloud Pro subscription. This subscription contains a secure backup function for your files. You can find more information about the myCloud Pro backup here.