You will need a USB-A to USB-A cable (or USB-A to Micro-USB, depending on your device's OTG port). Avoid cheap charging cables, as they lack stable data lines.

If Android 9.0 consumes too much overhead or your specific device drops connection drivers, consider transforming the unit into a streamlined retro gaming console. Emulation communities actively maintain portable Linux distributions optimized specifically for the RK3128 SoC. Firmware upgrade — Firefly Wiki

The availability of Android 9.0 firmware for the RK3128 is a testament to the retro-tech community. It effectively recycles e-waste into usable portable media players and emulation handhelds. While the hardware shows its age, the modern OS brings

If the flashing tool displays "No Devices Found," try using a different USB port (preferably a rear USB 2.0 port directly on the PC motherboard). Ensure you are using the specific OTG port on your portable device, as standard host USB ports cannot be used for flashing. Stuck in a Boot Loop

Use a short, high-quality USB-A to Micro-USB (or USB-C, depending on your device) cable. Avoid charging-only cables.

Open your chosen flashing software ( or AndroidTool ) on your PC.