A document describes the internal components of a USB flash drive and storage disk technologies. A typical USB flash drive contains a USB connector, storage controller, flash memory chip, crystal oscillator, LED indicator, and optional write-protect switch. It may also include space for a second flash memory chip. Common floppy disk sizes included 8-inch, 5.25-inch, and 3.5-inch disks. A CD contains a polycarbonate data layer with encoded bumps, a reflective layer, protective lacquer coating, and optional printed artwork, with data read by a laser beam being reflected back.