: Use a tool like WinRAR to extract the contents of your .rar file to a blank SD card or USB drive .
: Ensure your device is not powered off during the update process, as this can lead to hardware failure or "brick" the receiver. iSTAR Firmware Update V1.5.2 - NCTech Help Center
: On other models, power on the device and navigate to Settings > General Settings > Maintenance and select "Upgrade firmware" .
