SanDisk Extreme Pro SD UHS-II Class 3 64GB Memory Card 280MB/s
SanDisk's fastest SD Card ever features insane read speeds of up to 280MB/s and shot speeds of up to 250MB/s. This card works perfectly with our Panasonic GH4 to deliver incredible 8-bit 4K footage right in camera, no YAGH required. Your camera must be UHS-II compliant to take advantage of the crazy fast speed, and as of May, 2014, the only cameras we know of to do so are the Panasonic GH4 and FujiFilm X-T1, though the cards are backwards compatible and can be used with any SDHC enabled camera.
Performance/speed: Up to 280MB/s** read, Up to 250MB/s** write; U3 video recording speed**
Tested under extreme temperature conditions
Compatibility: Backwards-compatible with SDHC/SDXC supported host devices. UHS-II supported host required for UHS-II performance