I am receiving my first Mac Monday. I bought an Airport Extreme 1 GB. The internal drive is able to be seen and mapped by a Windows computer. I have an external USB 350 GB drive that I connected. I went into the utility and configured it for sharing but I can not connect to it. I enabled file sharing, chose disk password, set it, and after updating the internal is accessible but the external is not seen by my Windows computer. The external is viewable within the Disks area of the utility. Help a n00b please.