Patent attributes
A back cover, a middle frame, and a front cap are utilized as a sandwich package for packaging a portable storage device. An electronic element passes through the hollow middle frame and the middle frame holds the electronic element. The back cover covers the back end of the middle frame and the front cap covers the front end of the middle frame for fully packaging the electronic element. A moveable outer frame on the middle frame allows for withstanding the back cover and eliminating the manufacturing dimensional error of the PCB of the electronic element between the PCB and the back cover. The front cap covers the front end of the middle frame instead of the USB connector and provides the USB connector of the portable device more durability.