High-performance 512GB Nextorage A2 SE Achieves a maximum read speed of 1900MB/s. - Brand: Nextorage - Model: A2 SE - CFexpress 4.0 - Capacity: 512GB - Max Read Speed: 1900MB/s - Max Write Speed: 1700MB/s - Sustained Write Speed: 850MB/s Thank you for viewing. This is a Nextorage CFexpress type A card. Purchased on Amazon in January 2025 and used once, but I am selling it to organize my equipment. As this is a used item, we ask for your understanding before purchasing. If you have any questions or consultations, please contact us in the comments.