The HP mx330 Class 10 U3 V30 A1 microSD Flash Memory Cards are the perfect solution to expand on-board memory of mobile devices such as smartphones, tablets, and more, allowing you to free up space to enjoy more digital content, like apps, eBooks, photos, videos, music, and movies. The mx330 microSD Flash Memory Cards are rated Class 10, U3, V30 with read speeds of up to 100MB/s, guaranteeing that you can quickly and easily store and share content between devices, but also engage in HD photography and 4K Ultra HD video recording with U3 V30 technology on action cameras, drones, and more. Rated A1, the HP mx330 is optimized for app performance, allows users to run apps directly from the microSD card, delivering faster app launch and performance than ever before