IOS Metal Pen Drive U Disk for Iphone/Ipad

Features: Interface Type：USB 3.0 Product Type：Multifunctional Material：Metal MFi Certified：Yes Capacity：8G/16G/32G/64G Feature：Waterproff Read Rate：5-90Mb/s Write Rate：0-40Mb/s Interface：USB3.00x Faster than USB 2.0 About real capacity：  Capacity flash memory products are usually shipped in accordance with 1MB = 1000KB, 1G = 1000MB computing, but the operating system using binary arithmetic 1MB = 1024KB, 1GB = 1024MB, so there are some differences between the display capacity and standard capacity memory products.This is calculation difference between manufacturer and our PC 4GB =approximately 3.5-3.8GB 8GB =approximately 7.2GB-7.5GB  16GB=approximately 14GB-15GB 32GB=approximately 28GB-30GB 64GB=approximately 58GB-59GB