The invention provides a computer unit and a computer processing method which improve ease of operation by making it easier for the operator to view and select storage media devices connected to a computer unit. The computer unit has a USB root hub and an operating system that has the function of managing a storage media device connected to the root hub directly or indirectly via a hub. The unit includes a topology configuration portion that, when the hub is connected to a port of the root hub and the storage media device is connected to the hub, configures the hub as a virtual drive and setsup a connection whereby a folder corresponding to the storage media device is placed in the virtual drive; and a display controller that displays on a display device a directory list DP of the connections that were configured by the topology configuration portion.