Monoprice 3.5 Inches USB 2.0 4 PORT INT/EXT DUAL HUB BAY [Genesys Chipset] (100226) This 4-port USB Hub is designed to operate as either an internal or external USB 2.0 Hub. The hub can be operated as a bus- or externally-powered hub As an internal device it fits into standard 3.5" drive bay and can be secured into with drive screws on the sides