I'm sure the software for back up recommended by Jcwsgod & JoeBlack are excellent,
& wish I'd heard about them before having to refresh our Windows 8 system back in December!
I've been using a 495 MB external drive (memory stick) to back up our system since then. There was a funny coincidence today, and I'd needed to use that memory stick to keep the portable 64 Bit Cyberfox browser to which I've just finished adding many, though not all, of some of your favorite extensions!
So, the files for our Windows 8.1 are currently backed up in a folder on an older Windows XP sp3 desktop screen!
Thanks for sharing your configuration too Fantasy!