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 meet the latest speed class standards and feature very high read and write speeds, making them ideal for retrieving small amounts of data from various locations and speeding up app launch times. It is common for users to install and run mobile applications on a memory card to keep the internal storage of the mobile device free. For this use case, the random read and write performance of the card is crucial, which is why Transcend's microSDXC/SDHC 300S memory cards are excellent for storing mobile applications. The Application Performance Class was introduced to address this new trend. Transcend's microSDXC/SDHC 300S memory cards meet the new A1 standards, offering at least 1,500 IOPS for random read and 500 IOPS for random write, as well as a sustained sequential speed of at least 10 MB/s. With read and write speeds of up to 95 MB/s and 45 MB/s, respectively, Transcend's microSDXC/SDHC 300S memory cards also meet the UHS Speed Class 3 (U3) and UHS Video Speed Class 30 (V30) standards for 4K Ultra HD video recording.