usb 3.0 otg двойной micro usb флэш-ручка флэш-накопитель памяти для телефона pc (цвет:черный,серый,розовый,красный) u84

why the usb flash drive real capacity is not correct capacity? flash memory vendors are using decimal arithmetic:1mb = 1000kb,1g = 1000mb calculated, the operating system using binary arithmetic:1mb = 1024kb,1gb = 1024mb; so there are some differences between display capacity and nominal capacity of flash memory product example. 4g is about 3.4g;