About Nextorage: Nextorage is a Japanese company founded by former Sony engineering members who have developed memory cards for Sony cameras for over 20 years. The company offers products optimized for a variety of situations, from creative to entertainment, where strong reliability is required. CFexpress 4.0 support for high-speed transfers: Standard model with class-leading transfer speeds. 512GB: Maximum transfer rate (read) 3,900MB/s, Maximum transfer rate (write) 3,400MB/s Minimum sustained write speed (512GB): 850MB/s Entry-level model for multiple uses from still image to video shooting: This CFexpress Type B memory card is ideal for shooting still images of people and landscapes, including continuous shooting using the camera buffer, and for high-quality video up to 8K 30fps. Backward compatible with CFexpress2.0 devices: The CFexpress4.0 standard is backward compatible with CFexpress2.0, so it can be used safely with CFexpress2.0 compatible host devices. Package includes: CFexpress Type B memory card, dedicated case, and Memory Card File Rescue (download bonus) This product complies with the CFexpress Type B standard. Please check that your camera is compatible. Nextorage Japanese CFexpress 4.0 Type B 512GB Memory Card Max. Read Speed 3900MB/s Max Write Speed 3400MB/s NX-B3SE512G CF express 4.0 typeb Nextorage