Jaster | Purple Crystal USB Flash Drive 128GB High-speed Memory Stick Blue USB Drive 64GB 32GB for mobile phone and computer photography

About real capacity128MB = approximately 110MB-120MB4GB = approximately 3,6 GB-3,8 GB8GB = approximately 7,4 GB-7,6 GB16GB = approximately 14GB -15GB32GB =approximately 28GB -30GB64GB = approximately 58GB -60GB128GB = approximately 110GB-120GB、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.The pursuit of the perfect person is not recommended to buy.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.