Amazon.com: SanDisk Ultra 16GB Class 10 SDHC UHS-I Memory Card up to 80MB/s (SDSDUNC-016G-GN6IN) : Electronics
Amazon.com: SanDisk 256GB Ultra MicroSD Card for Lenovo Tablet Works with M10 Plus, Tab M10, M8, Tab M8 HD (SDSQUA4-256G-GN6MN) Class 10 Bundle with (1) Everything But Stromboli SD & Micro SDXC