print "Warning: the specified device %s does not look like a removable usb device." % device
f = raw_input("Do you really want to continue? y/N ")
if f == "y" or f == "Y":
print "Warning: the specified device %s does not look like a removable usb device." % device
f = raw_input("Do you really want to continue? y/N ")
if f == "y" or f == "Y":