RetroCompass
RetroCompass

RG35XX H — Firmware update

Quick answer

Steps

  1. 1Back up your saves and ROMs (the games card is left untouched if you use two cards).
  2. 2Download the latest 64-bit Anbernic OS image for the RG35XX H from win.anbernic.com.
  3. 3Extract the .7z/.zip until you have a single .img file.
  4. 4Flash the .img to the OS microSD (TF1) with balenaEtcher or Rufus, then safely eject.
  5. 5Insert the card in TF1 and power on; the device boots the new firmware.
Last verified: 2026-06-20Source: anbernic.com

The RG35XX H stock OS has no over-the-air updater, so updating means re-flashing the operating-system microSD (the TF1 slot) with a fresh image. Download the matching 64-bit image from Anbernic's WIN download portal, write it with balenaEtcher or Rufus, and boot from TF1. If your unit still runs a 32-bit stock OS dated before 25 June 2024, you cannot upgrade it in place — you must flash a new 64-bit card.

FAQ

Does the RG35XX H update over WiFi?
No. The stock Anbernic OS has no OTA update. You download the image and flash it to the microSD with balenaEtcher or Rufus.
Will updating erase my games and saves?
Re-flashing the OS card (TF1) wipes that card. Keep ROMs and saves on a second microSD (TF2), or back them up first, so only the OS card is overwritten.
Can I update an older 32-bit stock OS in place?
No. Stock OS builds dated before 25 June 2024 are 32-bit and cannot be upgraded to the 64-bit OS — flash a fresh 64-bit image to a new card instead.

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