1Support for upto 1TB mSATA SSD solid-state drive and support hard disk system installation and startup. 2X850 only supports for MSATA SSD drive and is an expansion board designed to solve storage problem for Raspberry Pi. 3Reserved a Micro-USB power outlet for additional power to the high-capacity mSATA SSD. 4The motherboard for Raspberry Pi is powered by a USB port and requires no additional external power. 5Adopts super high-speed USB 3.0 to SATA 6.0Gb/s bridge controller, convenient to use. 6USB3.0 super high speed connects PC for data transmission and USB2.0 high speed connects for Raspberry Pi for data transmission. 7No need of drive, compatible for Raspberry Pi, the ideal storage expansion solution for Raspberry Pi. 8The special USB port connection board eliminates the need for any cable connection and is easy to assemble by yourself. Condition: 100% Brand New Item Type: Expansion Board Material: Semiconductor Color: Black Applicable: Support for Raspberry Pi 3B+/3B; (Also applicable for ROCK 64 development board) Operating System: Support for Raspberry Pi any operating system Power Requirement: Support for Raspberry Pi direct power, no external power supply required Product Size: Approx. 57 x 56 mm / 2.24 x 2.20 in Weight: Approx. 80g / 2.8oz border: 1px solid000important;}1 x Hard Disk Expansion Board1 x USB3.0 Cable1 x USB Connector1 x Connecting Cable1 x Screw Kit (6 x Screw, 2 x Fastening Tool, 2 x Gasket)