Clicking on the Network Channel in SkyBox shows my PC as an SMB server. Clicking on that prompts me for myw Windows username and password. I enter them and it tells me they are incorrect. To check, I've made the same connection from my phone, using the same credentials, and it connects without any problem.
So, in Windows, I turned off the "Password Protected Sharing" option. It now lets me connect, but it only displays the "Default" account which has nothing in it. When I connect via my phone, I see the Default and account and my main account, which has all of the data.
So, on Windows, I set up a network share, made it public, and gave all permissions to everyone. SkyBox sees the share, but when I click on it, it says "You don't have permissions to access this folder". Again, I can access the folder and all of its contents from my phone.