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The Transcend 340S is a 512GB microSDXC card rated UHS-I U3, V30 and A2, with claimed reads up to 160 MB/s and writes up to 125 MB/s. That combination suits 4K video capture, action cameras, drones and phones, and the A2 rating helps app storage on Android. It sits in the value tier of high-capacity cards: the headline speeds are competitive on paper, but sustained write speed under long recordings is what separates it from premium cards like the SanDisk Extreme or Samsung Pro Plus. Buy it if you want a large card for everyday shooting and app storage rather than the fastest sustained writes.
In stock
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Lowest price we've seen: $269.86 on Nov 8 at Newegg. Tracked across 1 store since Nov 8.
Owner feedback on the 340S line is generally positive for reliability and capacity, with buyers using it in phones, cameras and handhelds. The main complaints concern write speed falling short of the claimed figure during large transfers and occasional compatibility quirks in older devices.
