Things You'll Need
Instructions
Go to the R4DS Cards website to access the R4 software download. Save the file to your computer and right-click on it when it finishes downloading. Click on "Extract All" to open the file.
Place your microSD card into the R4i adapter. Insert the R4i adapter into a USB port on your computer.
Wait for the "AutoPlay" window to pop up and click on "Open Folder to View Files."
Copy each file that you extracted and paste them each into the microSD card folder.
Test out your R4i card by placing the R4i adapter into the Nintendo DSi's game port and turning the system on. An R4 icon will appear on the main screen of the DSi.