• FAQ for reference:FAQ of Raspberry Pi X820 V3.0 USB 3.0 2.5" SATA HDD/SSD Storage Expansion Board
• User Manual: https://geekwormi.shop/X820
• For Raspberry Pi full power off and safe shutdown function, you can add one X735 Safe Shutdown Power Management & Auto Cooling board above the Raspberry Pi.
•  The Raspberry Pi and the 2.5" SATA are both not included in all the packing list.
• For 3.5 inch HDD hard disk drive X830 expansion board, please refer to X830 3.5" HDD Expansion Board.

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Overviews

• The X820 V3.0 SATA HDD/SSD expansion board (Updated Version of X820 V1.3) provides a complete storage solution for Raspberry Pi, It supports up to 4TB 2.5 inch SATA hard disk drives (HDD) / solid-state drive (SSD). Only 2.5 inch SATA interface HDD/SSD hard disk is suitable for X820 board;
• Used as a USB 3.0 Mobile Hard Disk when connecting a 2.5 inch SATA interface HDD/SSD with no extra power & no device driver installation required. Quick file transfer with high-speed USB 3.0 connectivity from a PC or a Mac.
• Supports USB booting from your HDD/SSD('reboot' command is supported), a great function to every raspberry pi user. USB mass storage boot is available on Raspberry Pi 3B, 3B+, 3A+, and 2B v1.2 only.
• Powers the Raspberry Pi via Pi's 40-pin header or Micro USB socket; Furthermore, On-board XH2.54 connector and USB power socket (5V 2A output) to power other devices, such as smartphone, tablet...
• Supports Raspberry Pi 3 Model B+(Plus) / 3 Model B / 2 Model B / 1 Model B+, Includes USB 3.0 cable and the mounting accessories for Raspberry Pi and 2.5" SATA SSD/HDD and X820 V3.0 Board

Compatible with

• Raspberry Pi 1 Model B+
• Raspberry Pi 2 Model B
• Raspberry Pi 3 Model B
• Raspberry Pi 3 Model B+(Plus)​

Key Features

• Supports up to 4TB 2.5 inch SATA hard disk drives (HDD) / solid-state drive (SSD) (Theoretically it can work with 6TB or 8TB as well. But actually we do not test the X820 board with 6tb or 8tb HDD, you can have a try.)
• Supports USB booting from your HDD/SSD 
• On-board push button to control power on /off (Press-ON, Hold the button pressed at least 2s -OFF)
• Powers the Raspberry Pi via Pi's 40-pin header or Micro USB socket
• On-board XH2.54 connector and USB power socket to power other devices
• Ideal storage solution for Raspberry Pi
• USB 3.1 Gen1 to SATA 6Gb/s bridge controller
• USB 2.0 connectivity offers plug-and-play functionality on your Raspberry Pi
• Quick file transfer with high-speed USB 3.0 connectivity from a PC or a Mac
• External Self-Powered or USB bus-powered
• LED red indicator indicates powered status and blue indicator indicates drive status
• Easy DIY with Raspberry Pi​
• Support All Raspberry Pi operating systems

​[How to Power]

• Power supply request: 5Vdc +/-5% , 4A
• Ports & Connectors:
• DC jack - 5.5x2.5mm, USB socket - USB 3.0 type A, 
• Power output connector - XH2.54 2-pin
• Power switch connector -PH2.0 4-pin
• PCB Size 107.5mm x 85mm

[Mobile Hard Disk Fucntion]