Sandisk Extreme Pro - Flash Memory Card - 64 GB - SDXC UHS-II (SDSDXPB-064G-A46) Extremely Fast Memory card.Compatibility: Backwards-compatible with SDHC/SDXC supported host devices. UHS-II supported host required for UHS-II performance High write speed supports advanced shooting modes High read speed for maximum workflow efficiency UHS speed Class 3 supports 4K, full HD, and 3D video recording Large capacity accommodate raw image files