SanDisk CFexpress Extreme Pro 400GB (4.0 / Type B / 3.700.MB/s)

SanDisk CFexpress Extreme Pro 400GB | A clear capacity and speed designation

SanDisk CFexpress Extreme Pro 400GB carries a 3,700 MB/s speed figure in its title, for photographers and other camera users choosing a CFexpress Type B card. Its 400GB capacity gives you a specific amount of card space to weigh against your own shooting needs; the CFexpress 4.0 Type B format is just as important when narrowing down your options. This is a specialist storage card, so the useful question is whether its format suits the equipment and workflow you have in mind. The speed number is prominent, but I wouldn’t read more into it than the title says: it gives a figure, without identifying a particular read or write measurement. That careful distinction matters when comparing cards. If you’re looking for a clearly named 400GB CFexpress Type B option, this SanDisk is easy to assess on those stated details.

How to read the name

The model name brings together the details that identify this card: SanDisk, Extreme Pro, 400GB, CFexpress 4.0, Type B, and a 3,700 MB/s speed figure. Those labels make it straightforward to compare the product with other storage options you’re considering, without relying on broad claims about what it will do in a particular camera or recording setup. I’d treat the format, capacity and speed figure as separate parts of the decision. The format identifies the card type; the capacity tells you its stated storage amount; and the speed figure is the number printed in the title. That’s a clear basis for deciding if this is the kind of card you want.

Technical Specifications

• Capacity: 400GB
• Format: CFexpress
• Version: 4.0
• Type: B
• Speed figure: 3,700 MB/s