[olentangy]

Um, it's trivial to drag any file on a Mac into iCloud. Look in the sidebar in the Finder, between Favorites and Devices is iCloud. Click there to see the contents of your iCloud storage.

On iOS, the iCloud Drive app lets you see everything in iCloud storage as well.

Certainly iOS app integration is important in iCloud, but it functions perfectly well for any other use too.

[eridius]

In the Finder, iCloud Drive is also available in the Go menu, or with the keyboard shortcut ⌘⇧I