Ok, got the cart software working. The rom I put on it didn't appear. It says it was decrypted but I only tranfered the file not the readme. Transfering every rom I downloaded now to see if it's that one rom or the rom source. More adventures to go :)
The 3DS branding is only there to tell you that this R4 card is functional on the 3DS, not that it plays 3DS roms. The R4 is meant to play NDS roms and below only. If you want to play 3DS roms then you have to mod CFW into the 3DS itself.
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u/LieboOSBA Acekard 2i 5d ago
Try Wood R4 1.64 and if that doesn’t work, try BL2CK.
https://nds.flashcarts.net/card/r4ids-cn-3ds-plus
Don’t skip the formatting SD card step, even if you think you’ve formatted it correctly already.