Amazon.com: SAMSUNG EVO Select Micro SD Memory Card with Adapter, 512GB microSDXC UHS-I U3 100MB/s Full HD & 4K UHD for Photos, Videos, Music Storage, MB-ME512HA : Electronics
Amazon.com: SanDisk 512GB Extreme microSDXC UHS-I Memory Card with Adapter - Up to 160MB/s, C10, U3, V30, 4K, A2, Micro SD - SDSQXA1-512G-GN6MA : Electronics
Adafruit SPI Flash SD Card - XTSD 512 MB : ID 4899 : $9.50 : Adafruit Industries, Unique & fun DIY electronics and kits