Best Selling Version Super Silicone usb flash drive 64GB 32GB 16GB 8GB 4GB pen drive USB2.0 u disk memory disk Product Features: Color: Black Capacity: 4GB 8GB 16GB 32GB 64GB 128GB Data Retention: Data kept for at least 10 years Endurance: 1000000 times rewritable Applicable models: the various brand PC and compatible computer Operating system: Windows 98 ME 2000 XP, the Linux 2.4.x win7 down support 2.0 and above Power supply: USB bus-powered (4.5V ~ 5.5V) Operating Current: <50mA Operating temperature: 0C ~ 60C Storage temperature: -20C ~ 85C Warranty: up to 1 year Package: 1 x USB flash drive, with bag package. Note: (1)About real capacity: 4GB=approximately 3.2GB-3.5GB 8GB=approximately 6.9GB-7.3GB 16GB=approximately 14GB-15GB 32GB=approximately 28GB-30GB 64GB=approximately 56GB-60GB 128GB=approximately 116GB-124GB Flash memory vendors are using decimal arithmetic: 1MB = 1000KB, 1G = 1000MB calculated, but the operating system is using binary arithmetic: 1MB = 1024KB, 1GB = 1024MB. So there are some differences between display capacity and nominal capacity of flash memory products. However, this is allowed to exist. Please do not doubt his authenticity. This is calculation difference between manufacturer and our PC; please Google & 39;Memory card capacity& 39; to get more information. (2)About color We all photos of merchandise offered, due to lighting, display color deviation, personal different understanding of colors and other factors, so that maybe there is some difference of colors between real product and photo , the final color to the actual goods shall prevail.