Snapshot Pro migration broken

Hi there,
I've been using Snapshot flawlessly for a long time for migrating a WP site. However, I did one last night and it was majorly F'd up. It failed to copy critical files like entire media folders, and while it copied files like style.css files, they were totally blank, including critical edits to functions.php

I'm not sure what is going on, but this is a) a new site b) a new theme c) a new host and obviously plugins here might also be the culprit. The theme is Salient, a pretty common theme. Hosting is Siteground, a pretty common host.

But it's imperative I get it figured out as I have a mission critical one using this theme (this was just a test) coming up and if Snapshot is broken I need to explore alternatives.

thanks a ton!