Exascend EX128GUSDU1-AD 128GB Catalyst UHS-I MicroSDXC Memory Card With SD AdapterGet the most performance out of your smartphone, tablet, camera, and other compatible devices with the 128GB Catalyst UHS I microSDXC Memory Card from Exascend. Designed to capture raw 4K videos without dropping frames and burst photography, this 128GB memory card delivers maximum read speed of 175 MB s and write speeds up to 150 MB s. The V30 Video Speed Class rating guarantees minimum write speeds of at least 30 MB s, while the A2 class rating