1. Download WinScp on your windows machine.
2. Make sure your windows and iPhone are connected to wifi
3. Go to your iphone and look into settings for wifi.
4. Clcik the small blue arrow on your connected network and note down the ip address.
5. launch WinScp on your windows machine and enter the ip address of your iphone.
6. leave default port 22 and click open.
7. That it, it will open in few seconds (just accept any warning if it shows)
8. From left side which is your windows view you can drag and drop file to right side which is your iPhone view.