The Extreme pro can hold up to 64 GB of photos and/or video taken with things like a DSLR camera that i did a what I’ve got on before. The card is able to read and write information at 95mb/s. This is very helpful when trying to take multiple pictures at the same time. The card is a class 30 which makes it capable of shoot HD video. The extreme pro is also built for a traveling photographer. It can withstand extreme cold and hot, shockproof, waterproof, and x-ray proof. This will allow you to take it anywhere without worrying about the safety of you content. The come in a number of different sizes including 16, 32, 64, 128, 256, and 516.