Amazon.com: SanDisk Micro SDXC Ultra Class 10 UHS-1 512GB Memory Card Works with Nintendo Switch OLED Model Gaming System (SDSQUA4-512G-GN6MN) Bundle with (1) Everything But Stromboli SD & MicroSD Card Reader :
SanDisk 256GB Ultra microSDXC A1 UHS-I/U1 Class 10 Memory Card with Adapter, Speed Up to 100MB/s (SDSQUAR-256G-GN6MA) Memory Cards - Newegg.com