The Prospec Imaging 64GB SDXC UHS-I Pro memory card gives you the speed and memory your DSLR needs for HD video and continuous still shooting. Prospec Imaging memory cards offer reliable operation and storage integrity, while delivering fast transfer speeds that keep up with today's HD video and DSLR cameras. It features read speeds up to 90MB/s and write speeds up to 45MB/s. Each card comes with a lifetime warranty and hassle-free exchange.To take full advantage of this card's speed it must be used in a UHS compatible device such as the Nikon D3200, D5200, D7000, Canon T4i, and Sony A77. The card will still work in non-UHS compatible devices but will function at slower speeds than what UHS is capable of.If your camera is having trouble recognizing this card please make sure the camera has the latest firmware installed. Nikon D7000 users will need firmware A: 1.0.2/B: 1.03 to have this card work properly.