Watch: What do the symbols on my SD card mean?

If you’ve ever bought an SD card, you’ve probably seen labels with C, U, or V symbols, but what do they actually mean? In this video, we break down SD card speed classes and why they matter when choosing a memory card for your device.

Understanding these classes is important, especially if you’re using cameras, drones, action cams, or even smartphones. The Speed Class (C2 – C10) is the most basic, supporting HD and some 4K videos, while the UHS Speed Class (U1, U3) is better suited for high-resolution video recording. If you’re into professional-level videography, the Video Speed Class (V6 – V90) ensures smooth footage capture for 4K and even 8K recording. Meanwhile, the Application Performance Class (A1, A2) is designed for running apps directly from an SD card, perfect for Android devices.

Picking the right SD card can improve performance, reduce lag, and ensure smooth video capture, but using the wrong one could slow things down. So, which SD card is best for your setup? Watch the full video and let us know in the comments!