The frame of a flash memory disk has an opening, a resilient support and a pair of switches. The pair of switches is extended from the frame and is constricted at their connection portions. Two recesses are formed at inner surfaces of the pair of switches. A PCB includes a flash memory and a USB connector thereon. A carrier has a pair of resilient wing latches and a resilient end latch. The carrier accommodates the PCB and exposes the USB connector. The carrier slides within the frame to extend or to retract the USB connector through the opening. A spring is secured between the carrier and the frame. An upper housing is assembled upon the frame, wherein the upper housing includes a button contacting the resilient support. A lower housing is assembled to the frame.