Use BalenaEtcher to write the CFW image to your microSD card. Once finished, Windows may say the drive needs formatting— and eject the card. Step 4: First Boot
The stock memory card comes packed with thousands of games, but many of them are duplicates, broken files, or written in foreign languages. Delete the games you will never play to free up space. X12 Plus Custom Firmware
If your CFW supports enhanced PlayStation 1 emulation, copy the necessary PS1 BIOS file (such as scph1001.bin ) into the designated BIOS folder. Step 5: First Boot and Initialization Safely eject the MicroSD card from your PC. Ensure your X12 Plus is completely turned off. Insert the card into the console's TF/MicroSD slot. Use BalenaEtcher to write the CFW image to your microSD card
Even though you cannot install a brand-new operating system, you can still drastically improve your device. You can optimize the system yourself without risking damage to the console. How to Optimize Your X12 Plus Without Custom Firmware Delete the games you will never play to free up space
If you want to take the next step in optimizing your handheld, I can help you: Find the for your specific model.