To afford portability, the DS was designed to have a far less weight than the normal consoles. Therefor, it couldn’t have any inbuilt storage device. As a result, external storage devices, called flashcards, need to be inserted into the device to save the content. The device comes with slots for these cards.
There are different kinds of storage cards, each with her respective features.
Different cards need to be used for diverse models of DS device. Of those, R4 is the most frequently used card. It enjoys a wide popularity among the users of Nintendo DS. The R4 cards come in different editions, depending on the edition of the Nintendo DS device. These are the original DS model, the DS Lite model, the DSi XL model, the DSi model plus the most recent Nintendo 3DS.
The original R4 DS cards can only be used on the original DS and DS Lite models. These are not compatible with other models of Nintendo DS that include the Dsi XL, Dsi, and 3DS. Though these would work with the DS Lite and DS models, it’s not desirable to do so. The R4 3DS card is meant for the most modern Nintendo console, the 3DS model. This card too may be used for rest of the models, but one should refrain from such a use.
The availability of so many cards probably makes you wonder which one you should use! All these models have nearly the same look, but they don’t work with all the consoles. It is important to point out here that none of these cards works on its own. Each R4 card requires an appropriate micro SD memory card which stores the operational files for its functioning. None of the R4 cards would work in the absence of a memory card. The bigger is the storage capacity of a memory card, the more data it can store without the necessity to delete some of the already stored data. For regular users, a 2GB memory card offers a fairly adequate amount of storage, but professional users will find 4GB or 8GB micro SD cards more fitting.
In case you prefer having a preconfigured R4 card that already contains the latest software on its memory card, you’ll need to buy an R4 card having a memory card, because otherwise you won’t be able to include the needed software, meaning that you’ll have to download and get the newest software for that card.