UHS-I or UHS-II: which memory card is best for you?

When you look to buy an SD or microSD card, the prices can range wildly. You might find a 64GB microSD card for £6 and another card of the same capacity for £60. Why is this? The difference largely comes down to data transfer speeds and the standard the card supports. In this guide we explain the difference between UHS-I and UHS-II memory cards, how to know which one you need, and where the newer SD Express, CFexpress Type A, and CFexpress Type B formats fit into the picture for today’s high-end cameras. Understanding U Class and V Class memory card ratings The first thing to look at when buying a memory card for your camera is the class rating on the label. To give some context to the question of UHS-I versus UHS-II, it helps to look at how memory card class ratings have evolved. Traditionally you would see...