I recently upgraded to the Sales Enterprise package to get access to the Sandbox functionality. I’ve created a Sandbox account but is couldn’t find the possibility to sync:
the Website/Landing Pages
the Hubdb
blog pages + posts
files/images
from production to the Sandbox account. It also isn’t an automatic process as the hubdb and de websitepages of my Sandbox account are empty after the sync.
When you sync with a Developer Sandbox, your CMS (Content) Hub content will not be synced. This is limited to CRM data, like records, properties, property groups, workflows, lists etc.
So sadly, the answer is currently no. It is not possible to copy over CMS content to your developer sandbox. This can however be achieved by using several APIs and creating a few scripts to migrate your content over. There might be a few marketplace apps that offer similar services.
Depending on the changes you want to make, it might be better to use Content Staging instead.