Speed:聽8GB 聽 ----- Class 6聽16GB/32GB /64GB----- Class 10聽Tip ( 2.0USB reader Test Result) :聽聽聽 聽 聽 Class 6: Read speed around 8-12MB/S ,Write speed around 4.5-6.5MB/S聽聽 聽 聽 Class10: Read speed around 10-15MB/S ,Write speed around 8.5-11MB/SAbout capacity:聽Flash memory vendors are using decimal arithmetic: 1MB = 1000KB, 1G = 1000MB calculated, but the operating system is using binary arithmetic: 1MB = 1024KB, 1GB = 1024MB.聽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.8GB=approximately 6.9GB-7.3GB 聽 聽 聽聽聽16GB=approximately 14GB-15GB 聽 聽 聽聽32GB=approximately 28GB-30GB聽64GB=approximately 58GB-59GB聽Warm Tips:聽The most reliable software to verify flash drive is H2testw.Please carefully review,and be careful.There are so many fake usb flash drive.You may be deceived.This will not only waste your money, but also wasted your time.But our products are real, we have been a credit management. You give us a trust, we give you the real goods and best services.Please kindly note:This cute pen drive is the best gift for your children ,your friends and yourself .If you need it urgently and want to a faster and safer shipping ,please kindly choose Hongkong post .Pls contact us free when you feel unhappy or unsatisfied, we will be sure responsible for any problem.Positive feedback is important for us, hopefully dear friends can communicate with us before any bad feedback. Thanks!聽聽聽聽聽聽 Note: - Thanks for coming to our shop,Hoping you have a happy shopping Trip in our store.- Every product sold by us has been strictly checked.selected and tested by the quality supervision department. We guarantee that every customer could purchase high quality products and get satisfied shopping experience!- Your purchase is important to us. If you have an experience that is less than exceptional we will help to make it right.Our hope is that each product we sold will help you express yourself and be known.- If you are satisfied with our products and services, please leave your positive feedback and 5 stars. and 5 stars for the detailed classification of your request!-Attention please1.Transition: 1cm=10mm=0.39inch2.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you buy.3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!   Best Regards! a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a