Just want to say, thank you for all you A23 guys.
The patient service to get my problem out.
The R4iDSN Card for DSi/DSiXL/ Nintendo 3DS (www.r4idsn.com) + Sandisk MicroSDHC 4G 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 SDHC card 4Gb.
-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 SDHC 4G
Sandisk MicroSD 4G,Capture a memory every day on SanDisk® Standard SDHC™cards. It's easy with affordable, quality cards from the minds behind flash memory. For use in all kinds of digital devices with SDHC™ card slots and with capacities up to 32GB*, SanDisk Standard cards ensure you have plenty of room to capture and store photos, videos and tunes every day. Plus, they're backed by a five-year limited warranty and priced to give you a lot for a little. SanDisk Standard SDHC cards are built for real life - handling its bumps and turns while capturing life in all its brilliance.