Abstract: A mass storage device capable of accessing a network storage in response to an access request of an electronic device electrically connected to the mass storage device, the mass storage device includes a first memory unit comprising a file management table for storing a first mapping relationship between a logical address and a network address of the network storage, and a controller for receiving an access request corresponding to the logical address from the electronic device and accessing a file in the network storage according to the network address through a network interface.