A few days ago my site was down and replaced with a completely different site that I was working on in the past. What happened was, the backup plugin I use called Updraft+ attaches to your Google Drive. And apparently, it by default doesn’t make a subfolder per each site being backed up. So I ended up restoring a different site from within the Updraft dashboard as it doesn’t seem to differentiate sites by itself. So please make a separate folder for each site you use Updraft with.