Use an SD card (preferably 2GB or 4GB) formatted to FAT32 .

A high-quality Mini-USB cable and a Windows PC (Windows 7/10 usually works best with legacy drivers). Step-by-Step Installation Guide

The "YG-912M" designation identifies the hardware platform, which typically features: Operating System : Generally runs on Windows CE (WinCE) , a common platform for older portable GPS units. Processor & RAM

A: You have the correct firmware name but the wrong hardware. The YG 912M chip is actually a 32-bit ARM. If your board has a "912L" or "912H," stop immediately—these are different silicon revisions.