SanDisk Extreme PRO SDXC UHS-II V60 Memory Card – 256 GB. Product Description. The SanDisk Extreme PRO SDXC UHS-II V60 256 GB card delivers high capacity plus professional-grade speed and resilience—ideal for extended shoots, high volume capture, and creators needing both performance and storage. Product Features. Up to ~280 MB/s read transfer speed. V60 minimum sustained write speed of 60 MB/s for smooth video capture. UHS-II interface for maximum throughput on compatible gear. Rugged construction for demanding environments. Supports burst photography, time-lapse, 4K/6K video and high frame-rate workflows. Lifetime limited warranty. Product Specifications. Capacity: 256 GB. Interface: SDXC UHS-II (V60 / U3 / Class 10). Max Read Speed: Up to ~280 MB/s. Typical Max Write Speed: Up to ~150 MB/s (manufacturer data). Minimum Sustained Write Speed: 60 MB/s. Dimensions (card): approx. 0.94″ × 1.26″ × 0.09″. Weight: approx. 1.67 g. Warranty: Lifetime limited.