The 64GB microSDXC Memory Card Pro Series Class 10 UHS-I from Samsung is a micro-size Secure Digital Extended Capacity card capable of storing up to 64GB of data. It has a Class 10 rating for minimum read and write speeds of 10MB/s--and it's also compliant with the Ultra High Speed Class 1 (UHS-I) specification, capable of up to 70MB/s read speeds and 20MB/s write speeds. It is compatible with microSDXC-enabled devices and readers. Using an optional adapter, you could insert it into a full-size SDXC slot, as well. This durable card is waterproof, safe to submerge even in seawater. It's also shockproof against small drops, X-ray proof and magnet-proof, in addition to being capable of withstanding extreme temperatures of -40 to 185°F.