RetroCompass
RetroCompass

TrimUI Model S — Custom firmware

Quick answer

Button combo

Files menuselect MinUI.zipA

Steps

  1. 1On a PC, download the latest MinUI build for the TrimUI Model S from the official MinUI releases.
  2. 2Format a fresh microSD (TF) card as FAT32 and copy the trimui folder and MinUI.zip to the card root.
  3. 3Insert the card, power on, open the Files browser, select MinUI.zip and press A to install.
  4. 4Wait for the card root to show the Bios, Roms and Saves folders, then reboot into MinUI.
  5. 5Add your games and BIOS files into the matching Roms and Bios folders on the card.
Last verified: 2026-06-20Source: trimui.com

MinUI is the most popular community launcher for the Model S, giving a clean front end with updated emulators and re-enabled per-emulator settings; GMenuNX is another option. Use a separate FAT32 microSD card: copy the trimui folder and MinUI.zip to the root, then run MinUI.zip from the on-device Files browser. After install the card root holds Bios, Roms and Saves folders for your content. Because the launcher lives on the SD card, removing it and inserting a stock card returns the Model S to its original firmware.

FAQ

Does installing MinUI erase the Model S?
No. MinUI runs from the microSD card, not internal storage. Swap back to a stock card and the original TrimUI firmware returns unchanged.
Which custom launchers work on the Model S?
MinUI has a dedicated Model S build and is the common choice; GMenuNX is an older alternative. Both install from a FAT32 microSD card via the Files browser.

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