Is it possible to use the "Watch" node to look at a folder on a local NAS or an alternativ Node that can look at the folder \172.x.x.x\images\saved\foran\ is there is any changes to the folder?
And if there is, then I need to grap the filename from that changes.
If you are using raspberry or other linux device you can mount the network path and monitor local mounted path.
No sure if it works, but you can give it a try
sudo mount //192.168.1.163/mp3 /mnt/readynas cifs username=yourusername,password=SuperGeheim 0 0
Monitor then with the watch node /mnt/readynas directory