This cost over 50,000 yen at an electronics retailer. I am selling it because I didn't use it. Thank you. This is a 400GB CFexpress Type B card with a maximum read speed of 1800MB/s and a write speed of 1500MB/s. It is ideal for 8K RAW video. - Brand: SUN EAST - Series: ULTIMATE PRO WHITE - Model: VPG400 - Capacity: 400GB - Max Read Speed: 1800MB/s - Max Write Speed: 1500MB/s - Sustained Write Speed: 800MB/s - Supported Standard: CFexpress Type B - 8K RAW Video Support: Yes SUNEAST | Sun East CFexpress Type-B Card [VPG400] SUNEAST ULTIMATE PRO WHITE Series 400GB SE-CFB400G24W1F