Drag & Drop?

Greetings everyone. I've just bought the MP Pro thingy and am currently ooh'ing and aah'ing at my screens. However, I can't seem to figure out how to drag and drop between computers. I'm pretty sure I saw somewhere that you can drag a file or folder from one computer and drop it in another. Or am I confused? If I can do it, could someone please explain how? I'm a total newb when it comes to these things. Thanks and merry christmas, everyone.