Hi,
algypan, welcome to the
ElevenForums
After paying some decent money on backup software, I ended up deciding to use
Hasleo Backup Suite Free.
It has a basic interface, it’s simple to use, there are many here that could help you with it.
You can backup to any drive, internal or external drive, as long as the drive is larger than your OS drive, a 500GB external or internal would be fine and a 1TB drive even better. You can buy Samsung SSD’s fairly cheap, depending on your budget.
You can not (or should not) save (backup) an image to the same drive as your OS (C: Drive)
The terms image and backup can be ambiguous in their use. But a software with the word backup in it can mean a system image backup process.
Backup can mean simple backups of folders and files etc (Hasleo can do this also) A system image is exactly that, an image (or backup) of a drive, most importantly your OS (Operating System) drive.
There are 3 quite common ones used in here: Hasleo, Macrium Reflect & AOMEI. There are others also.
This thread will most likely attract a lot of attention. The minute you say backup software people have opinions, which of course is fine, and helpful.
It will not start a war (I hope) unless you also include the term OneDrive

In which case, hire security and buy a flak jacket.
I hope I haven’t confused the issue.