RetroCompass
RetroCompass

GKD Bubble — Firmware update

Quick answer

Button combo

(power off)(power off)re-image microSD/TF

Steps

  1. 1The GKD Bubble is an RK3566 device that boots its OS from a microSD/TF card.
  2. 2Download the latest GKD Bubble OS image (often a plumOS-based stock build) from the official source and extract it to a single .img.
  3. 3Write the .img to the microSD/TF card with balenaEtcher (Rufus also works).
  4. 4Optional: expand the FAT32 ROMS partition to fill the card, then copy ROMs and BIOS back.
  5. 5Insert the card, power on with POWER, and confirm the new build.
Last verified: 2026-06-20Source: game-kiddy.com

The GKD Bubble runs its Linux OS from the microSD/TF card, so a firmware update means writing a newer image on a PC; there is no over-the-air patching. Some Bubble units ship without an OS or with plumOS, so you may be writing the stock image yourself. Always use a backup or spare card.

FAQ

My Bubble came with no OS.
Some units ship blank. Write the official GKD Bubble image (e.g. plumOS) to a microSD/TF with balenaEtcher, then boot from it.
Is there OTA?
No. Update by re-imaging the microSD/TF on a PC.

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