SanDisk Extreme SDXC Memory Card 64GB Class 10 UHS-I with a read speed of up to 45MB / s (064G-X46-SDSDX) (Personal Computers)
purchased with a Sony RX100 no pb in terms of speed I think the size is correct for a qq like me who makes movies if you are doing as pictures (in pixel 20million, jpeg) is more than 2500 pictures You still have to drop a little with the RAW option,