If you own an original R4 DS Card that only supports a max of 2GB microSD, then you're in the right place.
R4 DS Official Functions:
- 2nd generation storage device (no booting tool required)
- Flush fitting slot 1 card
- Uses MicroSD card, FAT16 or 32
- Supports any MicroSD card speed with no lag in game
- Supports Clean ROM, drag and drop. Works on any OS
- Built in NoPass
- Automatically detect save type
- Save directly to MicroSD card, not to onboard chip
- Supports Moonshell and other homebrew. Open I/O interface
- User friendly skinnable interface. Touchscreen or button operation
- Supports rumble pak and memory pak
- Supports the WiFi game, DS Rumble Pak, DS Browser
- Supports changes of the background of Operation Interface
- Support Skin DIY by setting background and font colors on Main Menu and Game Menu manually and automatically
- Supports 4 scale lightness adjustment ( DS Lite only )
- Supports the Soft Reset.
- Supports Action Replay cheat
- moonshell 1.6 support Software Reset function( Press START key back to the R4 menu)
Before we get started, you should already have the following:
- Original R4DS with a 2GB (or less) microSD, if not , buy follow this Link: R4 DS.
- microSD
card reader which should have been included with your R4DS,
unless you got the barebone 'Blister' package that didn't have anything
but the R4.
- The R4 v1.18 firmware
- A few braincells.
Step 1: Getting your microSD card ready
- Plug your microSD into the microSD USB card reader, then plug the USB card reader into your PC or Mac.
- Goto 'My Computer' and find the Removable Storage, then Right Click on your microSD card and choose "Format..."
- Format the microSD with the 'FAT (Default)' File system
Step 2: Extract the firmware
- Extract the files from the English-1.18.rar
file you downloaded. After you've extracted the 'English' folder from
within the English-1.18.rar, go into that directory and you
should see the following folders and files:

Step 3: Copy the firmware to your microSD
Step 4: Booting the DS
- Plug the microSD card into the slot located on the top of the R4DS.
- Plug the R4 DS into your Nintendo DS and boot it up