Features:

● Read Speed: 10MB -18MB/second

● Write Speed: 5MB -8MB/second

● USB 2.0 interface with higher speed and higher stability

● Portable; lightweight; high-quality metal protects the connector

●Environment Temperature: -40°C - +70°C

●Storage Temperature: -50°C - +80°C

●USB Service Voltage: 4.5V-5.5V

●Storage Lifetime: More than 5 years

●Use A-class chip; can be erased repeatedly for 100; 0000 times

●Operating System: Win98/ME/2000/XP/ Vista/win7 /win8; Mac OS 9.X/Linux2.4 or above

●USB connection:support Hot plug & Play.

●Easy to read and read in high speed ; No need drive/power supply only plug in.

About capacity:

64GB = approximately 58GB-60GB

This is calculation difference between manufacturer and your PC; please Google 'Memory card capacity' to get more information.

Your PC says 1GB = 1.073741824 Billion bytes where Market Defines 1 GB = 1.00 Billion bytes.