Newbie. Found an R4 card I bought many years ago but never used. Which firmware do I need to install and what micro sd card size? Thank you. : r/flashcarts
New R4I SDHC Dual Core Gold Pro Flash Card Adapter for 3DS, DSi XL / LL, DSL, DS - Newegg.com
Toturial: How to Setup R4i Gold 3ds Cart? : 8 Steps - Instructables
2020 New R4 SDHC Gold Pro + USB Cartridge adapters, 16G TF SD Card Reader Works on DS/3DS/2DS : Video Games
2021 Update Wood Version SDHC Dual Core with 16GB Micro SD Memory Card for Nintendo 3DS NDS New 3DSLL, No timebomb : Video Games
R4 Gold Pro R4i Revolution 2020 R4s R4 (Optional sd card with 500 nds games) | eBay
R4i Gold 3DS Plus for New 3DS /3DS v11.13/2DS/DSi/DS Lite、R4i Gold 3DS Plus --nds-card.com