Finera R4 Video Games Memory Card，3DS Game Flashcard Adapter Support for NDS MD GB GBC FC PCE

Great, it's not cheap but at least there is more than 1 people that bought this one. You need a micro sd card. If you want to use an SDXC one (more than 32 go) you have to format it to FAT32 (search for some tutorials). You can use a micro sd SDHC directly for it to work (32 go will already be huge). You need to find yourself the firmware or "kernel" (some files to drag in the microSD along the roms). For the kernel I used the "R4 Smart Update Original" (you can find it online easely) because it was more complete with emulators built in for gba and others consoles. I used it on DSi XL and 2ds XL but sadly it can't play 3ds game. The cards/R4/linkers that are capable of that are hard to find, some says you would be better off hacking the console to be able to play 3ds game. This product allows to play games easely without hacking your console and i imagine you can easely lend it to someone. If you struggle there are a lot of tutorial, good luck!

This thing is invaluable especially since lots of DS games don't let you keep multiple save files on one cartridge. You can also run romhacks, randomizers, etc., this is honestly the best way to take your DS game collection with you without having to swap cartridges or mod your console.

1.) For ANYONE wondering what kernel works with this, it the ACE3DS + R4ils Kernel😹😹. 2.) IT works REALLY WELL with twilight menu autoboot

Worked fine in my dsi and newer model ds

Ace3ds+wood works :-)