1.Is the usb flash drive real capacity? Sure, Our USB Flash Drive is the real capacity, you can use "H2test" to test it. H2test is most authoritative testing software in the world. If you need this software. 2.What is the write speed? The speed is different on different compute is normal, because the speed is influenced by many different factors, interface, computer condition, test software, systems,use,etc. 3.Why the USB Flash Drive real capacity is not correct capacity? Flash memory vendors are using decimal arithmetic: 1MB=1000KB, 1GB=1000MB calculated, the operating system using binary arithmetic:1MB=1024KB, 1GB=1024MB; So there are some differents between display capacity and nominal capacity of flash memory puoduct: 4G is about 3.6G 8G is about 7.2G 16G is about 14.4G 32G is about 28.8G 64G is about 57.5G
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