Do enhanced domains break files and attachments?

I'm testing out enhanced domains so I've created a partial copy of our production org that contains ALL objects. I noticed in a logged email record attached to a contact that the attachments (images) are gone. There should be (2) attachments highlighted in green from when I compare to my production org.

I also noticed when I go to File, there are no files. I have plenty of files 'Owned By Me' in my production org:

1. Does enhanced domains break and lose attachments and files?

2. Or is this just partial sandboxes don't carry over these things?

Please help! thanks!

#Sandboxes #Files Storage #Data Management