The SanDisk Extreme Pro Class 10 SDXC Memory Card ensures that you can capture all of life's exciting moments. With 256 GB of available storage space, you can easily store and carry all of those important memories without the dilemma of having to choose what to keep and what to delete. With transfer speeds of up to 170 MB/s, you can quickly and easily move your data, helping to save you time. Plus with Class 10 and UHS Speed Class 3 rating, you can capture 4K Ultra HD video without dropouts and stuttering. You can take the Extreme Pro Class 10 SDXC Memory Card with you wherever you go thanks to its durable design. The memory card is waterproof, shockproof, x-ray proof and temperature proof to ensure that your files remain safe at all times.