Ensure the extracted files (usually .zip , .sfc , .bin ) are placed in the correct ROMs folder on the SD card ( /Roms/[SystemName]/ ) and that you have BIOS files installed for systems like PS1.
If the device won't boot, you may need to reflash the official Miyoo firmware to fix the "wrong" file. Download WRONG mamo mini plus rar
If the file fails to copy or load, the included SD card is often corrupt. Use a high-quality, branded SD card (e.g., SanDisk, Samsung) and format it to FAT32 . Ensure the extracted files (usually
(e.g., A ROM pack, a game, OnionOS?)