Abstract: An improved memory transfer device includes an outer body and a transfer module disposed in the outer body. The outer body defines a insert groove on one side and encases a transfer module, one side of the insert groove corresponding to a transfer model groove insert end. The insert end extends and defines plural groove positions for accepting at least one memory card. The character of the present invention is that one of the plural groove positions accepts and uses an xD memory card.

Abstract: A card switch device comprises a base plate and a base frame at least, and the base plate is electrically connected to a socket on the side thereof. The base frame has a groove retaining contact elements of memory cards of not less than two standards. Thus, the card switch device can provide use for one or more memory cards.

Abstract: The present invention provides a tray-style flash memory drive that can be embedded in or externally connected to a computer system or a digital electronic product to enable the computer system or digital product to access various memory cards (flash memory cards), said flash memory drive comprises a case, a base in the case, and a tray that may slide or close on the base, wherein there is a circuit board in the case, and the circuit board has a signal transmission unit and a plurality of contacts. There is a plurality of lugs on the bottom of the tray. When the tray slides and opens, and a memory card is placed in it, the lugs will contact the I/O pins of the memory card on their top surfaces. When the tray slides backward and closes, the lugs will contact the contacts on the circuit board on their bottom surfaces electrically. Thus data stored in the memory card can be input and output via the transmission unit through the I/O pins of the memory card, the lugs on the tray, and the contacts.