Hugo was born out of Google so it has all of the same benefits and drawbacks as every Google project (both internal and external):

• Lots of capabilities. You name it, it's a feature.
• To support all of those capabilites, there's abstractions for everything -- enough to make you go a little insane if you have to go through the code.
• Lacking documentation. Nobody gets promoted for writing docs, so if you really need to know how that feature works, you have to go through the code.
• May be abandoned at any time (but pull requests/CLs are always welcome).

I really wish they'd just fix it. For whatever reason, the app just fails to connect to my phone. I already made sure it's trusted and tried all of the USB options.

The only transfer method that seems to work for me is adb pull and adb push.

I'm waiting for some support subs to make it over.