Review on 📷 SanDisk Extreme PRO 64GB UHS-I/U3 Micro SDXC Memory Card | Speeds Up To 95MB/s | 4K Ultra HD Ready | SDSDQXP-064G-G46A by James Gregg

I'm very satisfied with the Sandisk Extreme Pro series of cards. I will buy more of these cards. They cost more than others, but they just work better than the others. I've decided to share the test results with CrystalDiskMark. Note that Extreme Pro 16GB is faster than Extreme Pro 32GB, especially 512KB writes. All tests below (Sandisk and Lexar) were run on Surface Pro 3, Windows 10, with the internal reader and external USB3. (Lexar and Saicoo) Readers - all readers worked the same way. Windows read/write caching was enabled when available (I can also post results with caching disabled, similar metrics). All cards are formatted with NTFS and the standard cluster size. During the test, the system was in standby mode. These readings are better than the average group of readings (excluding the minimum and maximum values). Below are Crystal (3.0.1 x64) readings (rounded to whole numbers) for: 1 Pass 500MBSeq R/W512K R/W4K R/W4KQD32 R /W------------- Sandisk 16GB Extreme Pro (purchased July 2015) 91 8983 6506 0206 02* Please note that 16GB should be faster at 512KB writes than 32GSandisk 32GB Extreme Pro (purchased July 2015) 90 8477 3306 0205 02 Sandisk 64GB Extreme Plus (purchased January 2014) 92 618 5 08 01/02Lexar 633x (purchased August 2015, very disappointing 512k cards put it down) 06 01 (1.3) 05 01 (1.4)-- --------- --