SanDisk Ultra 64GB microSDXC UHS-I Card with Adapter at Amazon.com
$19.81
https://www.amazon.com/SanDisk-microSDXC-Standard-Packaging-SDSQUNC-064G-GN6MA/dp/B010Q588D4

Ideal for premium Android based smartphones and tablets
Up to 80 MB/s transfer speed
Class 10 for Full HD video recording and playback
Water proof, temperature proof, shock proof, X-ray proof and magnet proof
Memory Zone app lets you auto-manage media and memory for peak phone performance
Comes with SD adapter for use in cameras
Ten-year limited warranty