CFexpress Type A vs Type B — what is the difference?

Type B cards are physically larger and faster, used in high-end cameras (Canon R5, Nikon Z9). Type A cards are smaller and used in Sony cameras (A7 series, A9 III). They are not interchangeable — check your camera's card slot type before purchasing.

How long do CFexpress cards last?

CFexpress cards are rated for thousands of write cycles. A card rated for 3,000 cycles and used daily will last 8+ years. In practice, professional photographers replace cards every 3-5 years as a precaution. Always have backup cards and never use a card that has shown errors.

Best CFexpress Cards Type B 2026