Memory Card micro SDXC, 64GB, read speed up to 100MB/s, write speed up to 60MB/s, Class 10, UHS-I, U1, V10Video Class 10 The Western Digital memory card is a secure, plus very compact device for the storage of your data. The card's type is micro SDXC. This smaller format lets it fit into mobile phones and other smaller electronics. Its capacity is 64 GB. Its data download speed is 60 MB/s, and downloading from it is at a speed of 100 MB/s. The WD Purple QD101 SDXC 64GB is of a speed class of Class 10. Thanks to the parameters, it's well-suited for very demanding operations like the storage of 4K video. WD Purple QD101 SDXC 64GB Memory Card Key Features micro SDXC memory card Interface: UHS-I and U1 Total capacity: 64 GB Reading speed is 100 MB/s Writing speed: 60 MB/s Western Digital memory card has the speed class of Class 10 Perfect for recording 4K videos Even works in higher temperatures Western Digital video class: V10Video Class 10