Sandisk Extreme 128GB 160MB/s microSD Memory Card w/ adaptor. Enjoy enhanced app performance, incredibly-realistic 4K UHD video, and lightning-quick data transfer with the SanDisk Extreme 128GB microSD card. Boasting a maximum read speed of 160MB/s, 4K UHD and Full HD video, and a whopping 128GB of storage space, this memory card is the key to unlocking greater performance for your electronic devices.