Do you want to save internal storage space on your mobile device by running applications from a memory card? Then the Transcend microSDXC/SDHC 300S cards are the right choice! These cards feature a high-speed class and are characterized by very high read and write speeds. This makes them ideal for retrieving small amounts of data from anywhere and speeding up app launch times. Perfect for offloading apps. It is common for users to install and run mobile applications on a memory card to free up internal storage on their mobile device. For this use case, the random read and write performance of the card is crucial, which is why the Transcend microSDXC/SDHC 300S memory cards are excellent for storing mobile applications. The Application Performance Class was introduced to address this trend. The Transcend microSDXC/SDHC 300S memory cards meet the new A1 standards, offering at least 1500 IOPS for random read and 500 IOPS for random write, as well as a sustained sequential speed of at least 10 MB/s. Impressive performance. Transcend's microSDXC/SDHC 300S memory cards meet the UHS Speed Class 3 (U3) and UHS Video Speed Class 30 (V30) standards for 4K Ultra HD video recording, with read and write speeds of up to 95 MB/s and 45 MB/s, respectively. Extremely durable. To provide you with excellent performance and stability, Transcend's memory cards are tested under the following extreme conditions.