Test Updraft Plus BackUps

Here are a couple of bit of more general advice;

The first thing would be to always check your logs.

Secondly, restoring your site is a lot easier easier if you have optimised your site (particularly your DB). You can use the free plugin getwpo.com to do DB optimisations or there are other alternatives available.

With regards to answering your question. I always recommend users try and restore a backup on a regular basis (it lets you know what you can expect to see if the worst happens and helps preempt any restore issues)

I often use local host to test backups.

If you are using a Window machine, WAMP is popular: https://blog.containerize.com/how-to-install-and-configure-wamp-server-on-windows/

If you are using a MAC, you will probably using MAMP: https://www.smashingmagazine.com/2011/09/developing-wordpress-locally-with-mamp/

Most hosting will let you set up a subdomain, so you could also setup a test site on a subdomain for this purpose

Or we have a really neat cloning service: https://updraftplus.com/updraftclone/