You need a milti-card reader/writer. They plug in through your USB port.
No.
get a sd card
You don't need an SD card
Yes you can as long as you have a SD card installed in your DSi. Copy pictures from system to SD card. Install SD in PC card reader and download.
You can download them to wii, and then copy to the SD card.
You can purchase an SD card adapter and a usb sd card converter. it will fit the Sd card inside an you can read it such as a regular flash drive. Then you can physically copy your music back.
Yes, you can. If you have enough Wii points, you can download VC or WiiWare games. When you are about to download a game of any kind (VC or WiiWare) they will ask if you want to download it to the Wii System Memory, or an SD card. You must have an SD card inserted bfore downloading. After downloading it to the SD card, go to the SD card menu, and the game will be there. You can now play the game through the SD card menu.
I think you can download games on arcade town or some game download website
After downloading the games to your computer from Google Play, you can use the SD Card as an external drive in your computer. Plug the SD Card in and then you can drag and drop the programs you want from your hard drive to the SD card, that will copy the programs to the SD card and then they are at your disposal.
That's not how the DSi works - for one, code can't be executed from the SD card anyway. What you need to do is connect the DSi to the DSi store, and download the games there after you buy them.
yes, if your PC has both usb port and an sd-reader. you can't do it directly though.
You need a SD card to be able to save any additional information for games. Therefore, most of the time and SD card is required. (When you buy a 3DS, it comes with a 2GB SD card) DS/3DS download play does not require an SD card