Amazon has the PNY Turbo 64GB Class 10 MicroSDXC for $24.99 (49.99 – 50% off) with Free Shipping for a limited time.

PNY Turbo Performance High Speed MicroSDXC Flash Memory Cards are perfect for the latest smartphones, tablets, and action cameras. Add more storage to your mobile device and enjoy more mobile content such as apps, eBooks, web video, music and movies. High Speed MicroSDXC cards are rated Class 10 which guarantees fast transfer speeds so you can quickly transfer and share your content while you’re on the go.