USB flash memory speeds vary at lot: 14 Mb/s, 12 Mb/s, 3 Mb/s on three different brands of USB 2.0 sticks, Kingston way faster than PNY. “Test read/write speed of usb and ssd drives with dd command on Linux” | Silver Moon | July 12, 2014 at http://www.binarytides.com/linux-test-drive-speed/