Designed to provide professional-level performance for mobile device users, such as those looking to record Full HD, 3D, and 4K video in camcorders, tablets, smartphones, GoPros cameras, and more, the 128GB Professional 1000x microSDXC UHS-II Memory Card from Lexar features a storage capacity of 128GB and takes advantage of the UHS-II bus to provide read speeds of up to 150 MB/s and write speeds of up to 45 MB/s. Thanks to its U3 speed class rating, minimum write speeds are guaranteed not to drop below 30 MB/s.