Sooooo, 1st, thanks for responding. Now to further explain, looking at my iCloud on the web, thru my "system settings," and in "finder," they all reflect an abundance of available space. Yet, next to the "iCloud Drive" folder, in finder, there is a triangle, which brings up the prompt, "Your iCloud storage is full." Spent about an hour on the phone with Apple Support. We collected a vast array of files, which were then uploaded back to Apple, for their analysis. "We" don't think its actually full. Just need to figure out what's causing the prompt. We'll see what they come back with.
But again, thanks for responding.