The SanDisk SDCFE-064G-GN4NN is a CFexpress B (Type B) memory card with 64GB of storage capacity and a read speed of up to 1,500MB/s, making it an ideal choice for data-intensive applications such as 4K Ultra HD video, raw images, and high-resolution documents. This Extreme Pro memory card allows users to store large amounts of data without worrying about running out of storage space, and the high read speed ensures that files can be accessed quickly and efficiently.