In this video, we break down SD card speed classes and why they matter when choosing a memory card for your device. 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. The cards support read speeds of up to 170MB/s and carry U3, V30, and A2 speed ratings. Samsung said the cards support read speeds of up to 200MB/s and write speeds of up to 130MB/s. Read more in our articles including "Watch: What do the symbols on my SD card mean?" and "Moo Mini Cards: An Expensive Lesson in Proofreading".
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May 4, 2026In this video, we break down SD card speed classes and why they matter when choosing a memory card for your device. 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. The cards support read speeds of up to 170MB/s and carry U3, V30, and A2 speed ratings.
Our coverage of SD card speed class includes: "Watch: What do the symbols on my SD card mean?"; "Moo Mini Cards: An Expensive Lesson in Proofreading"; "Expensive Phones: This is the result of the "RAM crisis"". Each article provides unique insights and information.