NTG’s Take:
For those intense use cases where you’re trying record high definition and high bit rate recording, you’ll need a very fast memory card like the Sony M Series SDXC UHS-II. These cards from Sony will take everything you can throw at them. Though, for most people they are overkill and you can go with a cheaper UHS-1 option.
With up to 260MB/s[1] read and 100MB/s[1] write speeds, the UHS-II delivers unparalleled performance.