Just want to say, thank you for all you A23 guys.
The patient service to get my problem out.
R4iDSN Card for DSi/DSiXL/ Nintendo 3DS + Sandisk Micro SD 2G bundles, Save Even More with Value Bundles! You get more for your money when you buy these popular R4 card alone with memory card together - at one low price.This bundles includes a R4iDSN card and a Sandisk Micro SD card 2Gb.
-Support WOOD R4
-Support the DSi Firmware V1.4.3
-Support the N3DS
-Compatible with all DS editions of different kinds of language
-Supports DSL / DSi / LL / XL
-Supports Action Replay cheat
-Support SDHC (Micro SD 4G,8G,16G,32G)
-2nd generation storage device (no booting tool required)
-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
-Automatically detect saver type
-Saving directly to MicroSD card, not to onboard chip
-Supports Moonshell and other homebrew.
-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
-Supports 4-scale-lightness adjustment ( DS Lite only )
-Supports the Soft Reset.
-Moonshell 2.02 support Software Reset function( Press START key back to the R4i menu)
Sandisk Micro SD 2G
SanDisk® microSD™ 2GB* mobile memory cards are the ideal companion for casual phone users because they plug directly into the phone providing immediate expansion of memory storage needed for carrying more music and photos. Designed for ease of sharing your latest music downloads and fun pics with your friends.