Amazon.com: SanDisk 256GB Micro SDXC Ultra Memory Card Class 10 UHS-1 Works with Nintendo Switch Lite Gaming System (SDSQUAR-256G-GN6MN) Bundle with (1) Everything But Stromboli Micro SD Multi-Slot Card Reader : Video
Get a 12-month Nintendo Switch Family bundle for $50 from Amazon
Nintendo Switch™Micro SD Memory Card, MicroSDX (62 GB - 512 GB) | Western Digital