The bootloader can be picky. Ensure the card is strictly formatted to FAT32 and contains no other files besides the firmware update. If you need help building your firmware, tell me: What motherboard version is inside your printer?
The stock firmware often runs an older, modified version of Marlin. Upgrading to a clean, modern version of Marlin unlocks safety features like thermal runaway protection, linear advance, and better resume-after-power-loss stability. two trees sapphire pro firmware link
The mks_pic folder (Contains the user interface icons and assets for the touchscreen). 2. Community Upgrades: Custom Marlin and Klipper The bootloader can be picky
If you connect your Sapphire Pro to a Raspberry Pi or an old laptop running Klipper, you can run much faster speeds. Klipper handles all heavy processing outside of the 8-bit or 32-bit MKS board. The stock firmware often runs an older, modified
If your specific motherboard or driver version isn't listed, you can request it from their support team at service@twotrees3d.com.
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