Read speed

The maximum speed at which data can be copied off a memory card, typically onto a computer. This is useful in order to speed up the transfer of photos and videos, but not as important when shooting and filming as the memory card’s write speed. Read and write speeds are typically quoted in MB/s (megabytes per second), though some companies use Mb/s (megabits per second) – there are 8 bits in a byte, so this makes the numbers bigger.