A mass storage device of the present invention includes one or more memory elements and a logic module adapted to interface the one or more memory elements for exchanging data according to a data exchange protocol, in particular of the USB type, through a first port. The mass storage device has a module for detecting the presence of a power voltage associated with a first connector of the first port, and the logic module can set the storage device to either a Host or a Function device configuration depending on the detection carried out by the module for detecting the presence of a power voltage. The device also includes a second port adapted to implement a direct data exchange with further storage devices. The device additionally offers the possibility of communicating with radio or optical wireless ports exchanging data through a data bus, e.g. of the USB type.