evo>router>network hard drive...how do i get it done?

[unsane]

I have a question for you networking gurus.......i have a belkin wireless N router, which has a western digital 1TB hard drive attached to it. How do i, or what app would allow me to connect the evo over wifi to the hard drive and move files back and forth between the evo and the western digital? I am able to call up the ip 192.168.2.2 and do admin functions on it from the evo, but cannot swap files or even browse them for that matter. Any help on this would be greatly appreciated. Thanks