I have found the WDLive TV far more efficient and more productive just using and external USB HD or USB Stick to read and watch files, faster and a lot better than messing around with connection to your PC.
Chucking a mirror image on an external USB drive not only gives you a back up but you also do not have to double your electric use having a PC running as well.
Just a thought and basic observation but it is working very well for me this way.