directory and connecting to hard drive attached to router

I am attempting to access the hard drive that is connected (via usb) to my router (ASUS RT-N13U Rev.B1). How can I access the hard drive and then create a directory on my tablet, so I can automatically write to the external hard drive when it is in range of my router? I do not have internet a connection on the router. I am running Android 2.3.3 and I have a Tablet from China (M7206 #87), which I rooted. Please Help! I have been at this for 3 days straight. I have attempted to use apps such as cifsmanager and mount manager, but they are not working.

-Mr. Frustrated