I just did a computer upgrade for a client and discovered the Creative Cloud Libraries folder in Application Support is taking up over 110 GB of space. A peek inside and I see a couple of folders in the dcx sub-folder are taking up 50+ GB each. They consist of all Illustrator files (.ai), about 7000+ total, and date from now to far back as November 2018. 100+ GB and 7000+ files seems a bit too much. What are these exactly? How can I trim this down to free up space?
Why don't you ask John what he keeps in his Adobe CC Libraries?
He can free up space himself by logging-in to his Creative Cloud account. I would start with unused Fonts and Adobe Stock images. But he may have saved color swatches, paragraph styles, and other assets there that he shared with collaborators.
But it's 110+ GB of *.ai files - would fonts, stock images, swatches, etc. take up 110 GB of disk space?
What about re-doing the migration by uninstalling all of Adobe CC apps, deleting the whole Adobe folder in Application Support, but this time only re-installing the Adobe CC apps and NOT re-transferring the Adobe folder? What would he be missing in this scenario? Or would that stuff automatically download again upon launch of an Adobe app?