The Transcend 300S UHS-I MicroSDXC Memory Card 128GB 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 capturingSpecificationsFlash 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