There are three things, off the top of my head, that I can recall buying but either not using very much or not for it’s intended purpose. The first item is a portable bluetooth keyboard, I got it for the purpose of playing games on my android devices with it but the problem is that I haven’t found many games that actually even have keyboard support. The second item is a portable bluetooth mouse, it’s the same as the keyboard but with the additional issue of not working with my tablet for some reason. The third item is a DS flashcart, I forgot what it’s called but it’s the one from Datel and I had so many problems with it that I’ve been using it’s “Gigapack” for transferring small files between my two computers.