If the USB is larger than 64gb it will have to be formatted to FAT32 in 32gb format. So make sure you use a 32gb card or smaller. Also like has been said do not copy the first folder copy everything else inside of that onto the usb. Do not extract directly to the usb instead extract onto PC than copy over.
If all you have is 64gb and above use this lite software to format your 64gb+ usb drive partitioned into 32gb FAT32 format.
http://www.ridgecrop.demon.co.uk/ind...?guiformat.htm