Bestbuy offers SanDisk - Extreme PLUS 64GB microSDXC UHS-I Memory Card for $15.99 (orig. $17.99) with free shipping.

Product Description:
Store high-quality images with this 64GB SanDisk SDSQXBU-064G-AN6MA Extreme Plus MicroSDXC memory card. Shot speeds of up to 90 MB/sec. allow fast photo and video processing, while the 64GB capacity holds large media files. Featuring QuickFlow technology and read speeds of up to 200 MB/sec., this SanDisk Extreme Plus MicroSDXC memory card supports fast data transfer.

• Compatible with most devices that support microSDXC cards
  For wide-ranging use.
• Includes microSDXC to SD adapter
  Allows you to use this card with SD adapter slots.
• Improve your workflow efficiency
  With SanDisk QuickFlow Technology, this card optimizes performance for timesaving media offloads.
• Rugged construction
  Resists damage due to shock, water, X-rays and temperature.
• 64GB storage capacity
  Provides plenty of space for your photos, videos, documents, and other data.
• Up to 200MB/s read speed. Write speed up to 90MB/s
  With write speeds up to 90MB/s it's ideal for your Android smartphone, action cameras, or drones. This high-performance microSD captures 4K UHD video recording, Full HD video, and high-resolution photos.