A family of Microsoft word processing software products for creating web, email, and print documents.
AutoSave is only available for documents saved to OneDrive or SharePoint. That is how it is.
I believe that it will work as well with documents on your hard drive (C) that are automatically synced to OneDrive.
Otherwise, Ctrl+S is your friend!
I have seen enough people posting here and elsewhere who lost important work relying on AutoSave even when on OneDrive. I do not trust it for anything important.
For other options, see:
This is a user-to-user support forum.
Microsoft is not hearing about your problems from what you post here. You are discussing a problem with your fellow users here. We can give good advice about how to work with Word as it is and give suggestions for making it work properly.
Designers and their supervisors do see feedback. (You will almost certainly not get a direct response to that feedback but they do see it.)
Here is more about that:
I suggest using the public feedback portal so other users can see your feedback, comment and vote. If you want, you can post the URL of your feedback with your question here to lead others with the same problem to your feedback. Be the “squeaky wheel” that gets fixed!