EZ-Flash Vi
EZ-Flash Vi (SDHC) features an advanced PDA like interface and easy to use software. The EZVi works on all DS systems from the Fat NDS to the new DSi. To this day, across the world, EZ-Flash cards are being chosen over the competition for their reliability, performance, and ease of use. The EZ-Flash Vi slot-1 solution is based on mature Slot-1 technology, so there is no need to flash your system, use a passkey device, or patch your files anymore. You can focus on playing games without worrying anything else. More than that, EZ-Flash Vi's multimedia functions turns your system into a MULTIMEDIA POWERHOUSE!
Works on NDS, NDS Lite, and DSi
NOPASS technology, no need to modify DS console, no harm to the console, keeps console warranty.
Side plugin, prevent the MicroSD/SDHC suddenly drop, looks like original card
Support official Slot2 expansion device
Softreset reduces the damage to the power switch
RAM expansion, support offcial web browser
Rumble support, strength adjustable
GBA game support
Light control adjustable
Homebrew support, autoDLDI supported
Support MicroSD/SDHC, high capacity, high speed, no speed drop.
Direct save to MicroSD/SDHC, no more save loss.
EZ-Flash Vi
EZ-Flash Retractable Metallic Stylus
EZ-Thumb Pen
EZ-Flash microSD Card Reader
EZ-Flash Card Protector
R4i 
This version of the R4i SDHC is compatible with Micro SDHC (high capacity) cards including 4GB, 8GB, 16GB and even 32GB.
This release of the R4i SDHC is compatible with Micro SDHC (high capacity) cards including 4GB, 8GB, 16GB and even 32GB. The R4i SDHC is a Slot 1 all-in-one backup unit for the Nintendo DSi and DS Lite. The R4i SDHC does not require any additional Passcard or Passme devices to operate. Simply copy your ROMs or multimedia files onto a low cost, high capacity MicroSD card, insert the card into the the R4i SDHC and now insert the R4i SDHC into your DSi or DS Lite and enjoy!
You can play MP3's, read TXT books, and run your homebrew applications with ease. The R4 team has made functionality their number one priority with this new generation of DS development. This simply is the best product currently available for the Nintendo DS.
2nd generation storage device (no booting tool required)
Flush fitting Slot 1 card
Uses MicroSD card, FAT16 or 32
Supports up to 32GB Micro SD Card
Supports any MicroSD card speed with no lag in game
Supports clean ROMs, drag and drop
Compatible with all operating systems
Built in PassCard
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
Moonshell 1.6 support Software Reset function( Press START key back to the R4 menu)
R4i SDHC Card
SD Reader
Acekard 2i
The all new and all powerful Acekard 2i offers support for NDS, NDS Lite, and the new DSi. Acekard 2 has many great features and is a great buy. The interface is by far the best of any cart available.
Acekard 2i use the technology of directly writting save file to MicsoSD card. No need to manually select save size or backup save when turn on DS. No battery needed. Acekard 2i can use save files from other flash carts and do not need convert. All you need to do is make sure the save file has the same prefix name and put it at the same directory of ROM. Then you can just run the game to use new save file.
Acekard 2i inherit the best quality of acekard's products. You can just drag and drop software on MicroSD card to run. On first boot it takes some time to create save file. The loader time after save file is created is very fast.
The Acekard 2i is compatible with all homebrew because of the DLDI auto-patcher. You can just copy the homebrews to the MicroSD card and run it. You can use Moonshell, one of the most well known homebrew software on DS, for multi media. Watching movie, listening MP3, reading TXT novel on DS is so easy!
Supports DSi and NDS Lite
Save file is written directly to TF card. No need to manually select save size, no data loss.
Automatic DLDI patching. Run homebrew programs without converting.
Support soft-reset, Download Play and WiFi gaming!
Support SDHC TF card. Virtually unlimited storage size !
Support any brand of TF, with no slowdown!
Support Action Replay cheats . Build-in editor!
Low power consumption for longer operational time!
Built-in multiple languages and DIY skinning!
Hope this helps you alittle bit on picking a flash card
