Read and write from IOS to Mac

Hi, I can easily write a text file on my mac into a "out of game folder" directory like so.

 string directory = "/UserName/SomeFolderName";
 string textToWrite = "This is just some text";
 System.IO.File.WriteAllText(directory +"/fileName.txt",textToWrite);
 
 

Works like a charm.. now.. If I have an IOS device on the same network, how can I read / write to that file? I assume I have to make the folder shared or what is the process I must understand/undertake both on the IOS side and the Mac side.

Thank you.

Anxo.