I've got a WDTV Live wirelessly connected to my network through a router.
It finds all the shared folders/files on my PC through the network but for some reason it wont show my usb external hard drive which is also shared.
I used to have the same issue on my windows 7 laptop but some how got it to spontaneously work, i've since got a new PC with windows 8 and the external drive wont show on the WDTV Live.
Just to confirm, the external drive shows up on the network looking at it through other PCs. The WDTV Live is the only thing not discovering it.