Patent ID: 8606980

Claim:
A hard disk expansion apparatus in communication with a motherboard and at least one hard disk, the motherboard comprising an expansion connector with a signal transmission port and a power port, the hard disk expansion apparatus comprising: a printed circuit board (PCB); a connecting finger being a peripheral component interconnect-express (PCIE) gold finger, and positioned on the PCB, the connecting finger comprising a plurality of signal transmission pins and a plurality of power pins; a signal expander positioned on the PCB and electronically connected to the connecting finger; and a voltage adjustment circuit electronically connected between the power pins and the signal expander; wherein the power pins are inserted into the power port of the expansion connector to obtain power from the motherboard, the voltage adjustment circuit adjusts voltage of the power to enable the signal expander, the signal transmission pins are inserted into the signal transmission port of the expansion connector of the motherboard to receive a group of hard disk signals from the motherboard, the signal expander expands the group of hard disk signals into multiple-group of hard disk signals, and provides the multiple-group of hard disk signals to the at least one hard disk.