Transfer Files Over WiFi Multiple Devices Multiple Platforms
Solution 1:
There are multiple ways to do this. The "less complicated" way would to set up a shared folder. There are many articles on the Net how to do this and how to access them from android/IOS.
Another solution is to setup FTP. You could either do it from the windows machine, but the better option would be to use a router such as the Asus RT AC-56U that has the capabilities to transfer files between all 3 devices.
You could also use a cloud based solution, such as GDrive, OneDrive, etc, where you could upload documents and get them throughout all devices.