CFexpress 4.0 Type B Memory Card 240GB - High-Speed Capture

Our review of the ProGrade CFexpress 4.0 Type B 240GB card finds it best suited for photographers and cinematographers who need sustained high write performance during extended bursts and continuous RAW video capture. The single biggest reason to buy is its reliable sustained write speed of up to 700MB/s in the 240GB model, which keeps buffer clearing fast and prevents dropped frames on demanding mirrorless and cinema cameras. In everyday use it proved dependable, thermally stable, and well built for professional workflows.

Key Features

• Sustained write speed: Up to 700MB/s lets photographers shoot long RAW bursts or continuous 4K/6K video without unexpected slowdowns.
• High read speed: A rated read speed of 3100MB/s speeds off-loads to fast NVMe hosts and shortens tethering or backup time.
• PCIe Gen 4 with NVMe: Modern protocol support provides the fastest transfer pathways available for compatible devices and updated firmware.
• Battery friendly: The card is optimized to use less camera power during recording, extending shooting time between battery swaps.
• Durable build and serial protection: Laser-etched serial numbers and a robust construction improve authenticity checks and long term reliability.
• Recovery software available: Optional recovery tools can help restore corrupted files and maintain sustained card speed over years.

Who It's For

The CFexpress 4.0 Type B 240GB is ideal for working pros and serious enthusiasts using mirrorless, DSLR, or cinema cameras who record high-bitrate video or long RAW photo bursts and need a card that maintains steady write speed to avoid dropped frames. It also fits studio shooters who value fast off-loads to accelerate editing and delivery.

Those who shoot only casual JPEGs, low-resolution video, or have older readers without PCIe/NVMe support may find simpler SD cards more cost effective; also consider larger CFexpress capacities if you routinely record very long 8K takes or long multi-hour cinema shoots.

Pros & Cons

Pros

• Consistent sustained write speed that holds up during long bursts and continuous recording.
• Very fast read performance that cuts transfer times and streamlines post production workflows.
• Solid build quality, temperature control, and compatibility with current professional camera bodies.
• Backed by a 3-year warranty and a laser-etched serial number to deter counterfeits.

Cons

• Higher cost per gigabyte compared with entry-level cards, which may not suit casual shooters.
• To fully benefit from top transfer speeds, a compatible PCIe 4/NVMe host and updated firmware are required.

Specifications

Form factor	CFexpress Type B
Capacity	240GB
Maximum read speed	3100MB/s (240GB)
Sustained write speed	700MB/s (240GB)
Interface	PCIe Gen 4 with NVMe host controller
Warranty	3-year limited warranty

Our Verdict

The ProGrade CFexpress 4.0 Type B 240GB is a strong choice for professionals who need dependable sustained write performance and very fast off-loads; its thermal stability and build quality make it a solid value for demanding photo and video work. If you need the fastest reliable capture for RAW cinema or high-speed burst shooting, this card is worth the investment.

Frequently Asked Questions

Will this card work in my mirrorless camera?
Most mirrorless and cinema cameras that support CFexpress Type B will accept this card, but check your camera firmware and compatibility list before purchase.

Can I use the card with older XQD devices?
The card is backward compatible with devices that support XQD when the host device firmware explicitly provides compatibility.

What helps if files become corrupted?
ProGrade offers optional recovery software to help restore corrupted files and maintain card performance over time.