AV PRO SE CFexpress B v4 MK2 1 TB. Meet the new standard in high-performance storage media. Powered by CFexpress v4 Type B technology, this card is built to accelerate your workflow with reliable performance across all shooting modes, including 12K+ RAW and beyond. With capacities up to 4 TB, these cards offer versatility for a variety of production workflows. Tip: optimize your card’s performance and lifespan with regular firmware updates. To do that, you’ll need to pair it with the Angelbird card reader CFexpress B.