Dodd Camera - SANDISK Ultra 32gb Micro SDXC UHS-1 Class 10 Memory Card (max 100MB/S)
400 GB is no longer the biggest microSD card available. As of some time in February 2018, there will be a (very likely expensive!) 512 GB microSD card on the market! : r/gpdwin
256GB SanDisk Max Endurance MicroSDXC Memory Card (SDSQQVR-256G-GN6IA)