Extreme Pro CFexpress Type B Memory Card - 256 GB, 512GB

SanDisk Extreme Pro CFexpress Type B 512GB — high-capacity reliability for long shoot days

The gist: The larger-capacity CFexpress card in SanDisk's line, built for freelance videographers and photographers running long client shoot days without needing to stop and swap cards.

• Faster rated write speed than smaller sizes: rated up to 1700 MB/s read and 1400 MB/s write, an upgrade over the write speed of SanDisk's smaller-capacity CFexpress cards.
• Measured real-world transfer: independent testing clocked about 27 seconds to move 200 mixed raw/JPEG files (10.33GB) off a Nikon Z7 II via a CFexpress reader, relevant to how fast you can turn around client deliverables.
• Fewer card swaps mid-shoot: 512GB covers a full wedding, event, or multi-hour video shoot without needing to stop and change cards at a critical moment.
• XQD backward compatibility: useful for studios still running older camera bodies with CFexpress firmware support.

Independent test labs including StorageReview and The SSD Review have published sustained-transfer and thermal-throttling benchmarks on this card, generally confirming solid real-world performance even where it falls short of the rated maximums.

Best for: freelance photographers/videographers running long shoot days who need capacity and speed to avoid mid-job card swaps. Skip it if: your shoots are short or stills-only — a smaller, cheaper card in this line will cover that workload. Runs ~$479.99 — check the current price before buying.