The 128GB Extreme Pro CFast 2.0 Memory Card from SanDisk features enhanced data read speeds of up to 450 MB/s and data write speeds of up to 350 MB/s. The enhanced data read and write speeds make this the go to memory card for a variety of tasks such as Full HD and 4K video recording. This CFast 2.0 memory card has also been designed to withstand extreme temperature conditions from 23 to 158°F (-5 to 70°C).