R4 Cards- Memory Card Adapter
Technically speaking, the R4 cards are similar to a memory card adapter. The structure of R4 cards is designed like a USB casing with a slider slot for inserting microSD card. The R4 DS does not have any memory storage of its own. But, the R4 cards improve the data storage management of traditional microSD cards used with Nintendo DS platform.
Speaking of R4 functionality, the cards are second generation storage devices. The R4 ds cards are meant for Flush fitting SLOT-1. The installation is really easy and explained in the manual provided with the R4. After the installation, the effect is seen immediately with no booting required for activating the R4 firmware. The R4 cards support all types of microSD cards that are compatible with Nintendo DS system. There is no practical lag in gameplay, if you choose to buy original R4 cards. The low-quality R4 ds users may experience certain lag time with a few games. This is one of the main drawbacks of the low-quality R4 revolution cards that prevents users from buying them. With use of the original R4 ds, the multiplayer as well as single-player gameplay works fine without any kind of lags.
The R4 cards support extra features like Clear ROM and drag-and-drop. The drag-and-drop is really helpful in synchronising the data like game files with PC. The R4 ds supports all Operating Systems while connecting to PC for synchronization.
The R4 ds features a built-in NoPass feature which is essential for Nintendo DS compatibility. The manufacturers promise that the R4 software works fine with all Nintendo DS games. The R4 firmware can automatically detect the game save type. One of the main advantages is that the R4 ds saves game files directly on microSD card, and not on the onboard chip.