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The NeoSD is a flashcart for your Neo Geo AES console or MVS arcade board.

It features 768 megabits of flash memory (enough for the largest official Neo Geo game), an attractive and easy to use interface, genre/favorites filtering and region free options.

Firmware can be downloaded here Please note that you need to register your device. If firmware is not present after registering, your device was shipped with the most recent firmware already installed. (Current Firmware is 1.06)


  • Any storage size MicroSD card should work as long as it is FAT32 formatted. Terraonion generally recommends avoiding Samsung branded cards as they have been known to cause issues on their devices. Sandisk is the preferred manufacturer.
  • The Neobuilder tool is needed to compile your Neo Geo roms into the .Neo format, please see the Neobuilder Guide


Game Compatibility & Known Issues

NeoSD is 100% compatible with original retail games and the majority of home-brew.

Tips & Tricks

  • If you load up a ROM and you get a black screen: This can happen if you're using a bad ROM image. Please go to your SD card, delete the file called lastgame.cfg and attempt to boot. If that does not work you can also reset the NeoSD by creating a file called reset.cfg (no contents needed) and that will force the NeoSD to reset and restore.