What do Class 10, U3, V30 and A1 ratings mean?

Those little symbols printed on a microSD™ card can look confusing, but they each represent a different aspect of the card's performance. Rather than measuring one overall speed, these classifications indicate how the card performs under different workloads, such as recording high-resolution video, transferring files or running compatible applications. Understanding these ratings can help you choose a memory card that matches the requirements of your device and intended use.

TrailBit™ is validated to Class 10, U3, V30 and A1 performance standards. Class 10 indicates support for Full HD recording, while U3 and V30 certify minimum sustained write performance suitable for many compatible 4K recording applications. The A1 application performance rating helps improve responsiveness when the card is used in compatible devices that store or run applications. Together, these recognised industry standards provide confidence that your TrailBit™ microSD card is designed to deliver dependable performance across a wide range of everyday recording and storage applications.