SanDisk SDSDXN-064G-G46 Extreme SDXC UHS-I Class 10 64GB U3 memory card up to 60MB / sec. Read (Personal Computers)
Works virtually identical to the half as expensive Transcend, write measured values very similar in well 50MB / s with me. Super card, but why the extra cost? Processing is no better than Transcend, failures I had with both manufacturers never ...