The Angelbird 512 GB UHS-I V30 microSDXC AV PRO MK2 Memory Card is a 512 GB microSD card rated V30. It reads at up to 210 MB/s, writes at up to 175 MB/s, and never drops below 30 MB/s. The card is magnet resistant, shockproof, static proof, weatherproof, and X-ray proof.