256GB High-Performance 800x PRO UHS-I SDXC Card (BLUE Series) from Lexar features a storage capacity of 256GB and may be used for 4K, Full HD, and 3D video, plus raw and JPEG photos. It can achieve read speeds of up to 150 MB/s, write speeds of up to 45 MB/s and, thanks to the V30 speed class rating, write speeds are guaranteed not to drop below 30 MB/s.

Specific Read and Write Speeds:
256GB – up to 150MB/s Read, 45MB/s Write Speeds

Specifications:
Brand: Lexar Professional
Model: High Performance 800x PRO
Product: BLUE SERIES SDXC UHS-I Memory Card
Memory Capacity: 256GB
Card Format: SDXC
Read Speed (max): 150MB/s
Write Speed (max): 45MB/s
Speed (X-rating): 800x
Video Recording: 4K, Full HD and 3D Video
Bus Speed: UHS-I
UHS Speed Class: U1
Video Speed Class: V30
Speed Class: Class 10