Transcend 64GB MicroSDXC Class10 UHS-1 Memory Card with Adapter for $28.99. Shipping is free on orders over $35. If needed, use this Filler Tool to pad the order for free shipping. Here is a screenshot for your reference. It supports Ultra High Speed Class 1 specification (U1) and is Class 10 compliant with data transfer speed up to 45 MB/s. Most places have it for about $39.