he Transcend 300S UHS-I MicroSDXC Memory Card 128GB with Adapter is the perfect card for users to install and run mobile apps from in order to free up space on their device, making random read/write performance crucial. Transcend\'s 300S memory cards meet both the UHS Speed Class 1 (U1) and Class 10 standards for Full HD video recording, with read and write speeds of up to 95 MB/s and 45 MB/s respectively, plus minimum write speeds of 10 MB/s. To deliver improved performance and stability, Transcend\'s 300S microSD memory cards are tested to withstand extreme conditions.Features- Compliant with Application Performance Class 1 (A1), UHS Speed Class 3 (U3), and UHS Video Speed Class 30 (V30) standards- Up to 256GB storage capacity - Up to 95 MB/s read; 45 MB/s write- Ideal for smartphones, tablets, and digital cameras- Perfect for a smooth and uninterrupted 4K video capturing- Includes SD AdapterSpecificationsFlash Type: 3D NAND flashCapacity: 4 GB, 8 GB, 16 GB, 32 GB, 64 GB, 128 GB, 256 GBSpeed Class: UHS-I U3, UHS-I U1, Class 10, V30, A1Read Speed: 95MB/sWrite Speed: 45MB/sInsertion/Removal Cycles: 10,000Note: Speed may vary due to host hardware, software, usage, and storage capacityWarranty: 5 Year Limited