With Hyper-v, if you want to access the parent partition (host) file system, or attached USB drives, the only way to do so is through a UNC or IP connection from the child partition (guest) to the parent (host). To do so, you will have to create a network and bind it. You can read about how to setup an Internal Network in a previous post.
At times, you may find that despite being able to ping the parent from the child, and even resolve DNS names, you get a networking error:
For whatever reason, I have found that restarting the "Server" service on the parent resolves the issue. As you might imagine, the Server service is responsible for managing file sharing, among other things. What is strange is that it is already running, but every time I run into this issue, restarting the service is the fix.
Hope this helps someone out who could otherwise spend hours pulling their hair out debugging networking issues.