<Li> Standard - A USB plug--provides a physical interface to the host computer . Some USB flash drives use USB plug that does not protect the 4 contacts, with the possibility of plugging it into the USB port the other way around . </Li> <Li> USB mass storage controller--a small microcontroller with a small amount of on - chip ROM and RAM . </Li> <Li> NAND flash memory chip (s)--stores data (NAND flash is typically also used in digital cameras). </Li> <Li> Crystal oscillator--produces the device's main 12 MHz clock signal and controls the device's data output through a phase - locked loop . </Li>

Can a 1500 mb file fit on a 1.0 gb usb drive