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 Want to save space on your mobile device by running apps from a memory card? Transcend's microSDXC/SDHC 300S cards are the right choice! Compliant with the latest speed class, the cards boast excellent random read/write speed, perfect for retrieving small pieces of data from random locations and speeding app launch time.A good fit for mobile app storageIts common for users to install and run mobile apps from microSD cards in order to free device memory. Random read/write performance is thus crucial. Transcend's microSDXC/SDHC 300S memory cards are a great fit for storing mobile apps.Introducing Application Performance ClassThe Application Performance Class was introduced to adapt this new trend. T