Your microSD card has five speed ratings, and you're probably looking at the wrong one

Buying a microSD card should be one of the easiest tech purchases. Pick the storage size you need, grab one from a brand you trust, and get on with your day. Then you actually look at the card and find C10, U3, V30, A2, a Roman numeral, and some heroic read-speed number all fighting for attention on a piece of plastic smaller than your thumbnail.