If you're worried about outside circumstances ruining your PC's backups, it might be a good idea to have a look at an online backup service. Many online backup companies will actually mail you a hard drive with your encrypted data on it in the event of a hard drive failure, but you can also access and sync files when online - some even feature File Explorer integration.
You can usually also create images of your system for safekeeping in the event of a complete failure. These services usually have an app that is installed on your PC it scans for files that should be protected (such as system files and important documents), encrypts them, and then sends them off to the cloud for safekeeping. Using an online backup service, such as IDrive or Backblaze, will usually cost you more in the long run than, say, an external hard drive, but these services also give you peace of mind when it comes to fires, floods or other circumstances where your backups could be completely destroyed.
