Patent ID: 8886859

Claim:
A universal serial bus (USB) storage device comprising: a peripheral component interconnect express (PCIE) connector configured to connect to a motherboard of an electronic device, wherein, the PCIE connector comprises a power pin and at least one data pin; a plurality of USB flash drives; a plurality of USB buses; a USB controller comprising a USB power pin, at least one USB data pin, and a plurality of bus ports, wherein, the at least one USB data pin of the USB controller is configured to connect to the at least one data pin of the PCIE connector, each bus port of the USB controller is connected to one of the USB flash drives via a corresponding one of the USB buses; and a voltage conversion unit connected between the power pin of the PCIE connector and the USB power pin of the USB controller, and configured to convert a first voltage of the power pin of the PCIE connector to a second voltage to power the USB controller via the USB power pin.