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R4 cartridge - Wikipedia
R4 3DS 6.3.0 Update Firmware Released Last Week. | R4 3DS - R4i 3DS Cards News / Reviews
Luma3DS - R4i Gold pro (2013) - r4i-gold.com | GBAtemp.net - The Independent Video Game Community
R4 sdhc 2013 : r/flashcarts
I have this old R4 from 2013/14 I think. The micro sd is broken, so I bought a new one, but I don't know which version should I download. The right version