Go to the RD-8 download page and download the operating system update tool. 2. After shutting down, connect RD-8 to your computer and run the update. 3. Press the power button next to the RD-8's USB port with a paper clip (or similar size) to turn on the device. 4. RD-8 will not boot in boot mode. 5. Click the [Update] button of the firmware updater. When the update is complete, restart your device.