The present invention relates to a
USB storage device having a
USB plug with top and bottom terminals, connection terminals of the
USB plug being provided at both top and bottom sides so that an information terminal apparatus such as a PC, a notebook, an MP3 player and a
digital camera, can be inserted in face-down / face-up manners, comprising a main unit and a cover unit, the main unit comprising a USB plug having connection terminals at both sides to be connected to a USB port of the information terminal apparatus to communicate data, and slide rails provided in a longitudinal direction to define a sliding range for rail protrusions of the cover unit; and the cover unit comprising rail protrusions inserted into the slide rails and provided at both ends of the cover unit toward the main unit so that the cover unit can rotatably move along with the slide rail. Therefore, since the USB storage device according to the present invention includes the connection terminals of the USB plug at top and bottom sides, it can be inserted into the information terminal apparatus in a face-down or face-up manner. Further, in the USB storage device according to the present invention, the sliding range for the rail protrusions provided on the cover unit is defined into the slide rails extending the corresponding main unit, thereby preventing the cover unit from being separated and missing.