Transcends SDXC/SDHC UHS-I Speed Class 3 (U3) 633x microSD cards provide exactly the performance and capacity you need to get the most out of UHS-I compatible smartphones, tablets, digital cameras, and camcorders. With transfer speeds of up to 95 MB/s for reading and 85 MB/s for writing, the cards can even record high-resolution 4K and 3D videos, significantly reducing the time it takes to copy videos to your computer. Additionally, the memory cards are made with high-quality MLC NAND flash memory chips to ensure exceptional reliability and durability.