Is there a way to set up an auto save of the Prime 7 file while working on it, to prevent loss of work in the event of a system computer problem. This would aid in not having to re-create lost work.
There isn't. Else you should find it in the Options pop-up.
Guess PTC considers it too risky, knowing that most corrupt Prime files occur because the computer shut down while writing the file. They must have reasoned: "Consider what happens if the computer develops a problem while creating an automatic auto-save file: you end up with a corrupt file. That's worse than still having your file that you started on at the beginning of the day....Can't take that risk!"
You'll have to use an alarm to help you remind that you want to save your work regularly.
You can vote for this idea - "Autosave Functionnality in Mathcad Prime": https://community.ptc.com/t5/PTC-Mathcad-Ideas/Autosave-Functionnality-in-Mathcad-Prime/idi-p/653847
And a comment to it:
The most recent event was when my system shut down unannounced, all work was lost, except those programs which create periodic backups. Prime 7 was unfortunately not one of the programs which created a *.bak file etc. Please direct me to the crash log if it will aid in this endeavor. I did re-create all of the lost work, but it cost me valuable time.