Run DriverInstall.exe from Rockchip Driver Assistant → reboot PC.
If you want to to work on multiple RK3128 devices: rk3128 android 90 firmware portable
Android 9.0 Go Edition is optimized for 1GB RAM. To convert your portable firmware: Run DriverInstall
Most portable variants come with 1GB to 2GB of DDR3 RAM , which is the "sweet spot" for maintaining a smooth UI on Android 9.0. rk3128 android 90 firmware portable