Samsung 512 GB MicroSDXC EVO Select Memory Card with Adapter. With impressive speed and reliability, the 512 GB microSDXC EVO Select memory card lets you get the most out of your devices. Ultrafast read and write speeds of up to 100MB/s and 90MB/s, respectively, and backed by Stage 4 water resistance, keep your data safe from water, extreme temperatures, and other harsh conditions. Feel confident capturing, storing, and transferring 4K UHD videos, photos, music, and other large files effortlessly. Your memories and adventures are irreplaceable and now unforgettable.