... . Specification: usb 2.0 or usb 3.0 usb flash drive,usb,flash drive,pen drive,usb flash memory,usb flash,usb stick,usb drive,usb flash disk,pendrive,thumb drive,thumbdrive.usb disk,usb flash memory stick,1gb,2gb,4gb,8gb,16gb,32gb,64gb,128gb,256gb ... etc.2) Make the Customer's design to be Usb Flash Drive.3) Preload Customize's Data and make the Data cannot be deleted ...