Sounds like you are all set to go then.
I run the 'WindowsImageBackup' about once a month to keep it up to date. ( some only run it every 6 months)
If you re-run it at anytime, the old image will be over written with the new one....
but you don't have to re-run the usb recovery drive option.
Now if you ever have problems due to a dodgy windows update, malware, ransomware etc you have nothing to worry about.... just run the image backup and away you go again.
Just a couple of things to point out....
The USB recovery drive ( the 16gb usb ) can be tested to make sure it's going to work for you.
Just plug the usb drive in and then reboot the system.
If the computer is set to boot from usb, the system will boot into the Recovery Advanced Options screen.
If it doesn't, you will have to alter the boot settings in the bios.
Always best to know and set this before you actually need it.
If you decide to test it, here's a tutorial that will explain the Advanced options screens etc.
How to Access and use Advanced Startup Options in Windows 10 (or 8)
Another point worth knowing.... The Usb recovery drive is not exclusive to your system.
So if your system is Win 10 64bit Home ( which is the standard) this usb recovery drive will boot any Win 10 64bit Home system to the recovery advanced options settings.
So if you had another system, you wouldn't need to make another usb recovery drive.
Glad I was able to help.
Safe surfing.