The 256GB Ultra microSD UHS-I Card offers high-speed performance with read speeds up to 195MB/s and write speeds up to 160MB/s, enabling efficient file transfers. It supports 4K Ultra HD video recording with UHS-I U3 and Video Speed Class V30 ratings, ensuring smooth video capture. With a massive storage capacity of 256GB, it accommodates high-resolution photos and videos, including hours of Full HD video. Designed for durability, it is temperature proof, waterproof, shock proof, and more, making it suitable for various environments. The SanDisk Memory Zone app facilitates easy backup, organization, and transfer of your media files. | Sandisk | | 256GB Ultra microSD UHS-I Card | Best Buy