Write rights on WD Cloud

As a software developer, I am using the WD Mycloud to store projects I am working on.
What I found is that I cannot create new files programmatically (using GDI+).
I assume it’s a writing-rights issue. I looked up all possible info on that but No matter what I tried, I cannot get it to work the way I want.
Since I was able to copy the existing files from my machine to the WD Drive I assumed I had write rights, (duuuhhh).
The drive is assigned as H:\ drive in my network.

Have you read the EULA, tried the links at the bottom of this page, Copyright or Contact WD?