Abstract: A method of performing a data transaction between a portable storage device and an electronic device includes determining positions of the portable storage device by a positioning module of the portable storage device, calculating distance between a current position and a position of a previous data transaction to determine whether a position-based criterion is met by a processing module, establishing a data connection between the portable storage device and the electronic device when the position-based criterion is met, and performing the data transaction between the portable storage device and the electronic device.

Abstract: A connecting module includes a plurality of input ends and an output end. The output end of the connecting module is coupled to an external storage device. When at least two input ends of the connecting module are coupled to corresponding output ends of the host device, the connecting module outputs power supplied by the host device to the external storage device via the plurality of input ends. This way, the connecting module outputs power to the external device when at least two input ends of the connecting module are coupled to the host device, for ensuring the external storage device to receive sufficient power at the instant the external storage device receives power.

Abstract: A method of performing a data transaction between a portable storage device and an electronic device includes determining positions of the portable storage device by a positioning module of the portable storage device, calculating distance between a current position and a position of a previous data transaction to determine whether a position-based criterion is met by a processing module, establishing a data connection between the portable storage device and the electronic device when the position-based criterion is met, and performing the data transaction between the portable storage device and the electronic device.