According to the step-by-step guide on Reddit , here is how you install it:
: Turn off your device and insert the SD card into your PC. 330rtc .rar
: Reinsert the card and turn the device back on. This prevents Onion OS from overwriting the hardware clock time. According to the step-by-step guide on Reddit ,
: Open the .rar file to find a file named .noTimeRestore . 330rtc .rar
: Copy the .noTimeRestore file into the following directory on your SD card: /SD/.tmp_update/config/ .