Amazon offers Prime members the SanDisk Ultra 64GB UHS-I Class 10 microSDXC Memory Card for Fire Tablets and Fire TV
, model no. SDSQUNB-064G-AZFMN, for $15.99
with free shipping
. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.98.) That's $14 off list and the lowest price we could find, although it was a buck less in December. It features transfer speeds of up to 80MB/s and is the only memory card tested and certified to work with the Fire Tablet and Fire TV.