How to Set Up ArkOS on R36S 2026: Complete Step-by-Step Guide
ArkOS is the most popular custom firmware for the R36S — it unlocks better performance, more emulators, and a cleaner interface than the stock firmware. This guide walks you through the complete setup from download to first game in under 30 minutes.
⏱ Quick Overview
💻 Windows / Mac PC
Required to download ArkOS and flash the MicroSD card. Any modern PC works.
💾 MicroSD Card Reader
To connect your MicroSD card to your PC. Most laptops have a built-in slot. USB adapters cost ~$5.
📱 R36S Device
R36S 64GB or 128GB. Both versions are fully compatible with ArkOS 2.0.
💾 MicroSD Card (32GB+)
The card that came with your R36S works. Or use a new Samsung/SanDisk MicroSD (Class 10 or faster).
🔧 Balena Etcher (Free)
Free tool to flash the ArkOS image to your MicroSD. Download from balena.io/etcher.
📶 Internet Connection
To download ArkOS image file (~1-2GB). A stable connection is recommended.
Download the ArkOS Image File
Go to the official ArkOS GitHub releases page: github.com/christianhaitian/arkos/releases
Download the latest release for the RK2023 / R36S device. The file will be named something like ArkOS_RK2023_YYYYMMDD.img.gz. File size is approximately 1–2GB. Wait for the download to complete fully before proceeding.
Download and Install Balena Etcher
Go to balena.io/etcher and download the free Balena Etcher tool for your operating system (Windows or Mac). Install it normally. This is the tool you will use to write the ArkOS image to your MicroSD card.
Insert Your MicroSD Card
Remove the MicroSD card from your R36S (it's in the slot on the side of the device). Insert it into your PC using a MicroSD card reader or your laptop's built-in slot. Your PC should recognize it as a removable drive.
roms and saves folders.
Open Balena Etcher and Select Files
Open Balena Etcher. Click "Flash from file" and select the ArkOS .img.gz file you downloaded. Then click "Select target" and choose your MicroSD card from the list. Make sure you select the correct drive — selecting the wrong drive will erase it.
Flash and Verify
Click "Flash!" to start the process. Balena Etcher will write the ArkOS image to your MicroSD card and then automatically verify it. This takes approximately 10–15 minutes depending on your card speed. Do not remove the card during this process. When complete, Etcher will show a green “Flash Complete!” message.
Insert MicroSD and Power On
Safely eject the MicroSD card from your PC. Insert it back into your R36S. Press and hold the power button for 2–3 seconds to turn on the device. The first boot takes longer than normal — approximately 2–3 minutes — as ArkOS expands the filesystem. Do not turn off the device during this process.
Complete First Boot Configuration
ArkOS will guide you through initial setup: timezone selection, language, and button mapping. Use the D-pad to navigate and the A button to confirm. Set your timezone to match your location. The default button layout works well for most users — you can change it later in Settings.
Update ArkOS (Recommended)
Once booted, go to Options → Updates to check for the latest ArkOS updates. If your R36S has WiFi capability, connect to your network first. If not, you can download updates manually from the ArkOS GitHub page and transfer via MicroSD.
Copy ROMs to the MicroSD Card
Connect your MicroSD card to your PC again. You will see a roms folder. Inside are subfolders for each system: gba, snes, nes, psx, n64, etc. Copy your ROM files into the correct system folder. GBA games go in roms/gba/, PS1 games go in roms/psx/, and so on.
Scrape Game Art and Launch
Eject the MicroSD and reinsert into your R36S. Boot up — ArkOS will automatically detect your new games. To add game artwork (box art, screenshots), go to Options → Scraper and run the scraper. This downloads artwork for all your games automatically. Then navigate to any system and select a game to start playing.
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