saving documents

See this article Get help with iCloud Drive - Apple Support

How do I automatically save my documents to iCloud Drive?

You can update the settings on your iPhone, iPad, or iPod touch so that your documents automatically save to iCloud Drive, On My [device], or a third-party cloud service.

1. Go to Settings.
2. Choose to update the settings for Pages, Numbers, or Keynote.
3. Tap Document Storage.
4. Choose where you want to automatically save your documents.

If you are saving documents to iCloud Drive, the documents should sync back to your computer. You can access the documents through iCloud Drive in the Finder Sidebar.

To see the documents that are stored on your computer, go to Finder, and select your user/home folder. With that Finder window as the front window, either select Finder/View/Show View options or go command - J. When the View options opens, check ’Show Library Folder’. That should make your user library folder visible in your user/home folder. Select Library/Mobile Documents.