Crucial Step. Connect your stock SD card to a PC and copy every single file to a safe folder. If the CFW fails, you’ll need these files to restore the device. General Installation Steps (The Basics)
Before you start hunting for files, ensure you have the following: sup m3 custom firmware
The SUP M3 is a fantastic little device for its price, but the stock software barely scratches the surface of what it can do. By installing , you transform a "cheap toy" into a legitimate pocket-sized emulation station. Crucial Step
Unleashing the Power of Your Retro Handheld: The Ultimate Guide to SUP M3 Custom Firmware sup m3 custom firmware
Use a tool like BalenaEtcher or Win32DiskImager to write the custom firmware .img file to your new SD card.