After my USB drive died, I used the backup from the My Servers plugin. Everything worked and I am back up and running (thank god). My only issue now is that I am getting the error message when trying to reactivate the USB backup feature of the My Servers plugin:
Sorry, an error occurred The error is: Unable to connect to backup.unraid.net:22.
I have checked and I do not see anywhere that my router is blocking the port. I did try to use ssh backup.unraid.net in the terminal, but got a Permission denied (publickey) error.