I purchased a Thecus N4200 server, but can not figure out how to transfer the large number of music files on my Windows 7 PC, which I have accumulated using itunes. I have figured out how to transfer individual files, but have not figured out how to transfer a folder. Since Thecus devices are popular at this site I am hoping someone can guide me in this regard. The device does show up on the left hand column of the itunes window. Please enlighten me.