Today, the Nintendo game cards R4 are

Today, the Nintendo game cards R4 are, in general, and very simply, the best storage cartridges available in stores today. Although the card is very popular in many countries is often referred to by various names, such as English Revolution for DS, DS Yushan Japanese and German YDS. The following is a brief story about the R4.
R4 card for Nintendo game entered the market in early 2007. It was designed by a team of engineers who proudly call themselves "R4 Team". A trivial fact is that the original R4 card, unlike its successor, the R4v2, there was a push lock system to place a micro SD card inside. Although it was earlier this gaming revolution however, the mechanism came with a set of problems and result in breakage of the micro SD card due to a malfunction of the spring (though it happens in rare cases). This made the R4 team to make appropriate changes to the card after it launched a new version under the name of R4v2.
The new version is r4i V2, was undisturbed by the spring mechanism as in it instead of the spring mechanism comes with a slot in his back. Therefore, it allowed users to manually push the micro SD card inside the cartridge. Although people were concerned that the micro SD card can detach the cartridge, while the game was going, was tested to found that the results were well against this speculation.