Method and system for expanding the memory capacity of devices that use flash memory cards In one aspect, a memory card expander assembly includes an adaptor (23) shaped to be connected to a memory card slot (12) of a host device (11), and a receptacle assembly (21) in communication with the adaptor (23) and operative to be attached to the host device (11) The receptacle assembly (21) includes an expanded memory card slot operative to connect to a memory card such that the host device (11) can communicate with the connected memory card when the adaptor (23) is connected to the memory card slot (12).