I have just rebooted both the raspberrypi and the duo and now I can see all the files thank you so very much for your persistence in helping me sort this out when i rebooted the raspberry showed up in the network scan and when i pressed ok this time it opened the mount option and called it self publicRASPBERRYPI then asked me for a password and username and I have been able to play a file
both the RPi and duo are backed up now thanks again I cannot give you rep as I already did and I need to give someone else rep before I can add to yours but everyone should know how much you helped