Cameras have two SD card slots because cameras need two different types of memory cards: an SD card for photos and videos, and a microSD card for storing music, pictures, and other files. Cameras usually come with one type of memory card, but you can buy an extra one if you want.
The microSD card is smaller than the SD card, so it’s good for storing small amounts of data. You can also use the microSD card to store videos and photos if you’re not sure you’ll use the SD card for that purpose.
