Designed for mobile devices, including smartphones, handheld gaming consoles, action cameras, drone cameras, and more, the 256GB 340S UHS-I microSDXC Card from Transcend is compliant with the A2 speed class and features fast random read and write speeds, making it suitable for quick app launches and retrieving small pieces of data from random locations. The 340S has a capacity of 256GB, supports the UHS-I bus, and features a speed class rating of U3 / V30, both of which guarantee minimum write speeds of 30 MB/s. Read speeds are supported up to 160 MB/s and write speeds max out at 125 MB/s, also making this card suitable for 4K Ultra HD Full HD video, plus raw and JPEG still photos and bursts.

As with most Transcend cards, this memory card is shockproof, X-ray proof, and waterproof, while also being able to withstand static, plus temperatures from -13 to 185°F, allowing you to take this card with you into extreme environments. Should the card's data become compromised, you also benefit from Transcend's free RecoveRx software for to help recover deleted content, including photos, documents, music, and videos. Also featured is an endurance rating of up to 10,000 insertion/removal cycles.