... 3.Pre-load data,autorun USB specification Avalable capacityCommon size: 32MB-16GBBig size: 32GB, 64GB, 128GBCustom USBcustom plastic usb,pvc usb.vinyl ... , metal box, color paper box, white paper box, PVC box, gift box and so on.custom packageAddtional serviePre-load data,boot ...