Extreme Pro UHS-II SDXC Memory Card, 64GB

SanDisk Extreme Pro UHS-II SDXC 64GB — All-Day Shooting Capacity at Pro Write Speed

The gist: The same 300 MB/s read / 260 MB/s write UHS-II V90 performance as the 32 GB card — but with double the capacity for travel shooters who need to run all day without swapping cards on a long excursion.

• 64 GB at V90 write speed: Holds approximately 80 minutes of 4K RAW or several thousand burst RAW stills before needing to offload — enough buffer for a full city walking tour without stopping to dump cards.
• 300 MB/s read: Offloads the full card to a laptop in around two minutes — faster than many hotel wi-fi connections can deliver a single 4K clip from cloud storage.
• 260 MB/s sustained write / V90: Guaranteed minimum 90 MB/s sustained write ensures zero dropped frames in continuous 8K or high-bitrate 4K recording, even in heat-stressed conditions.
• Weather and shock protection: Built to withstand extreme temperature ranges and physical shocks common in adventure and expedition travel shooting.

B&H Photo’s product page for the SDSDXDK-064G-ANCIN confirms the 300 MB/s read and 260 MB/s write specifications — V90 and U3 rated — across the entire SDSDXDK product line regardless of capacity.

Best for: Travel photographers and videographers with UHS-II camera slots who shoot full days between offloads and don’t want to swap cards mid-activity. Skip it if: Your camera has a UHS-I or CFexpress slot only — a less expensive UHS-I card delivers equivalent real-world throughput on those bodies. Runs ~$60 — check the current price before buying.