Access is denied in Windows 8 App

I am creating a Windows Store App that allows you to write and edit basic text files with the extension .note. I have written a basic script which works fine in previews, but simply wont work when I run as a Windows 8 app. The code below is raising an Access to path is denied error in the debug. (snippet from the full script)

 var MyDocsPath = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
 path = MyDocsPath+"/TakeNote/Notes/";
 Debug.Log(path);
 
 if (!Directory.Exists(path)){
     
     Debug.Log("Directory does not exist");
     Directory.CreateDirectory(path);
 }else{
     Debug.Log("Directory exists");
 }

I think that this code is correct (because it works in previews) and that my issue is with giving the app the correct permissions on the system, but I can't seem to find where you can add file access permission in unity or in visual studio express.

Any help would be greatly appreciated.