Samsung MB-MD64DA/AM Pro Plus 64GB MicroSDXC Memory Card - 95MB/s Read, 90MB/s Write Up to 95MB/s Read and 90MB/s Write speed Storage Capacity: 64 GB Great Performance in High-End Smartphones, Tablet PCs, Action Cameras, and DSLRs Ideal for 4K content, Full HD Video recording and high resolution pictures Reliability Built to Last - Water, Temperature, X-ray and Magnetic Proof