Abstract: A Micro-Secure Digital (“SD”) device loaded with a smart card that can be issued in bulk and in card form is provided. The device includes: a SD interface electrically connected to a host terminal; at least one memory module; a SD controller connected to the SD interface to provide communication between a host terminal and the memory module; at least one smart card IC for data communication with the SD controller; and a smart card interface for issuing smart cards. Since the Micro-SD device is provided with a smart card function and a card form satisfying the ISO 7810 standard, it may be issued in bulk through automation using a conventional automatic card-issuing device that automatically issues a credit card or a USIM card.