7.3GB of available hard-disk space to install applications; additional 3GB to download all optional content; additional free space required during installation (cannot install on a volume that uses a case-sensitive file system or on removable flash storage devices).
Jeff Arola • Adobe Community Professional, Dec 07, 2020
Optional Content is, for example, the Frames, Backgrounds and Graphics under Window>Graphics.
The thumbnails have blue triangles in the upper right corner to signify they will be downloaded when clicked.
Nope, I've spent quite a bit of time looking for a way to do it. I have a super slow dsl connection... when I'm bored I just click on a frame, wait. click on another.... it's a one time download for each.