There are thousands of models of SD cards, and not all of them are compatible with the Raspberry Pi. So before you buy a card you can’t use, run it past our SD card checker.*
To use it, you need to know four things: the brand, type, size, and class. Here’s how it might look on a typical SD card:
Once you’ve got that, just plug it into our checker and find out instantly if it’s compatible. For some SD cards, you might also need to know the model number — this varies based on the brand, but check the back of the packaging or the description online. And that’s it – have fun!
**Thank you to the eLinux Wiki for providing the original list of compatible SD cards, which you can find here