SanDisk 128GB Extreme PRO UHS-I SDXC Memory CardDesigned for SD devices that can capture Full HD, 3D, and 4K video, as well as raw and burst photography, the 128GB Extreme PRO UHS I SDXC Memory Card from SanDisk has a capacity of 128GB, is compatible with the UHS I bus, and features a speed class rating of V30, which guarantees minimum write speeds of 30 MB s. If your device does not support the V30 standard, this card also supports the U3 standard, which likewise guarantees minimum write speeds of