what is hard-coded path ?

Do you want to know here files are stored by the isolated store? Try this:

public static string GetIsoStoragePath()
{
    var path = string.Empty;
    using(var isoStore = IsolatedStorageFile.GetUserStoreForAssembly())
    {
       var rootDirProperty = isoStore.GetType().GetProperty("RootDirectory", BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public);
      var pathAsObject = rootDirProperty.GetValue(isoStore, null);
      path = pathAsObject.ToString();
    }   
    return path;
}

This is an example of what happens when people read random articles but never read up on the basics. Hard coded means it's specified in code, not as a variable that can be changed, but as a static value. Consider buying some basic references and reading them.