My friend wants to sell me his Nds he claims that he has over 120 games on it, he calls it a S4 card? D4?? I dont really know the name...I want to know is it safe to buy that, I mean his NDS with that card? will it mess up?.
definitely. i have one myself. incredibly easy to use...and it's great to have zillions of games in it at once, without having to carry all the cartridges around.
The are really good, I have one for mine. You can easily download other games and put it on the card, there is a small memory card inside it, like the one that comes in phones or in blackberries. You just load games onto there, turn it on and the D4 card takes you to a menu where you select the game you want.
It is totally worth it as most of the Nintendo DS games are pretty poor and not worth the retail price.