The SanDisk memory card is designed as a secure and very small data storage device. The type of card is micro SDXC. This smaller format lets it fit into mobile phones and other smaller electronics. Its total capacity is 128 GB. It downloads data at a speed of 90 MB/s. Reading from it is at a speed of 170 MB/s. The SanDisk MicroSDXC 128GB Extreme Plus A2 UHS-I (V30) U3 + SD Adapter falls into a speed class of Class 10. Thanks to its parameters, it's suited for very demanding operations like the saving of 4K video. The packaging also contains a very useful adapter to SD size.