Visit Amazon sites : http://www.amazon.com/gp/product/B00F5DEPOY?tag=gallianostore-20
64GB Samsung MicroSD XC MicroSDXC Class 10 Memory Card 64G (64 Gigabyte) for Samsung Gravity
Sealed Retail Pack
UHS-1 Read Speed up to 70 MBs Write Speed up to 20 MBs
64GB Extreme Capacity
SoCal Trade Inc MicroSD SD Dual Slot USB Card Reader reads up to 64GB
1 Year limited warranty