…. my older SanDisk Extreme rated at 80MB/s took 15.46 seconds to write the images to disc. The newer SanDisk Extreme Pro SDHC UHS-II did the same thing in 8:49 seconds – almost twice as fast. Funny thing is that when transferring the images to my hard drive over a USB 3.0 connection, both SD cards took about the same about of time, 47 sec for the older SD and 43 for the newer UHS-II.  Once the  buffer filled in the camera and the card continued to shoot at a slower frame rate, the newer UHS-II card was still twice as fast writing to disc and slowed down to a frame rate at almost 3fps, while the older card slowed to a rate of only 1.4fps……

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Fuji X-T1 SanDisk Extreme Pro SDHC UHS-II Tom Grill