This is a CFexpress Type B card. It's a 512GB Nextorage B2 SE, with high-speed performance: 1950MB/s read and 1900MB/s write. - Brand: Nextorage - Capacity: 512GB - Model: B2 SE - Read Speed: 1950MB/s - Write Speed: 1900MB/s Purchased on Amazon for 16,980 yen. I mainly use another card and have occasionally used this one as a backup. It has been formatted and is fully functional. Please note that we may decline purchases from users who have not verified their identity.