The Transcend USD340S is a high-capacity 256 GB MicroSDXC card designed to handle demanding storage tasks in compact devices. It utilizes 3D NAND flash technology and a UHS-I interface to achieve sequential read speeds of up to 160 MB/s and write speeds reaching 125 MB/s, which makes transferring large files significantly faster. With its V30 video speed class and U3 rating, you can reliably record high-resolution 4K video without interruptions, while the A2 application performance class ensures that apps installed on the card launch and run smoothly. Beyond raw speed, this card is built for resilience in challenging environments, featuring a design that is waterproof, shockproof, and resistant to X-rays, static, and extreme temperatures ranging from -25°C to 85°C. Weighing only 0.4 g and measuring 11 x 15 x 1 mm, it fits seamlessly into smartphones, drones, or action cameras. To increase its versatility, a microSD to SD adapter is included in the package, allowing you to move your data easily between different types of hardware.