A network-attached storage system and method includes a network-attached storage apparatus and removable storage medium installed in sockets in that apparatus. The storage medium includes an RF receiver and circuitry for erasing or disabling access to memory thereon. A host controller determines when a removable storage medium has been installed in or removed from a socket. A network interface controller is provided for coupling to an external network. An RF transmitter is coupled to a controller. The controller is coupled to each socket via the host controller and to the network interface controller. The controller determines, based on signals from the host controller, when the removal of a removable storage medium from the socket is unauthorized and sends a signal to the RF transmitter for transmission to the RF receiver in the removed removable storage medium to cause the memory therein to be erased or access thereto to be disabled.