With a microSD card, capacity does not tell you everything – the speed class matters more. A U3 and V30 marking means the card holds a steady write speed while recording video, A2 speeds up how apps run on a phone, and V10 and Class 10 are more for photos and a security camera. Most microSD cards come with an SD adapter, so the same card also goes into a camera or a laptop card reader; full-size SD cards such as the SanDisk Extreme Pro are here as well.
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With a microSD card, capacity does not tell you everything – the speed class matters more. A U3 and V30 marking means the card holds a steady write speed while recording video, A2 speeds up how apps run on a phone, and V10 and Class 10 are more for photos and a security camera. Most microSD cards come with an SD adapter, so the same card also goes into a camera or a laptop card reader; full-size SD cards such as the SanDisk Extreme Pro are here as well.