Size - is the main difference. A 'standard memory card is approximately 25mm square. A micro SD card is about a third of the size. There are adaptors available so you can use a micro SD card in a standard SD card slot.
It doesn't matter what kind of SD card you use, but SanDisk SD cards are a very good and reliable brand name for SD cards.
If it is a digital camera that utilises an SD card
yes a 2gb sd card
Get a Micro-SD to SD adapter. It looks like an SD card that has space for the Micro-SD card. Some Micro-SD cards are supplied with the adapters.
Micro-SD
Nokia 6600 can't sppor sd card
You can't use an SD Card with an GameCube.
Yes you Can Use A SD Card On A Desktop Computer .Just buy a USB Card Reader And Plug it in to your USB Port.
if its a Micro SD to SD adaptor you can use it to make the micro SD usable on normal SD slot devices
Yes, the Wii will be able to read the Micro SD card by using the standard SD card adapter.
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.