The Premier series memory cards are especially designed for digital camera users. They are compliant with SD 3.0 specification (Ultra High Speed 1 UHS-I) and backwards compatible with SD 2.0 specification devices. 64GB memory card read/write speeds are as high as 30/10 MB/sec providing you with higher performance high reliability and outstanding durability. High Durability Data stored on Premier card benefits from added protective features including: X-ray proof construction resistance to extreme temperatures error correcting code (ECC) and write-switch protection functions. The Capacity You Need The Premier SDXC UHS-I Class 10 memory cards have been launched in a higher 64GB capacity eliminating the need to spend time replacing the card during photo shoots. Using the equipment required by professional photographers you can feel at ease and not worry about blank spots noise or the need to shoot at a lower resolution.