概要

using System.Diagnostics;
using UnityEngine;

public class Example : MonoBehaviour
{
    private void Awake()
    {
        SetNoBackupFlag( Application.persistentDataPath );
    }

    [Conditional( "UNITY_IOS" )]
    private static void SetNoBackupFlag( string path )
    {
#if !UNITY_EDITOR && UNITY_IOS
        UnityEngine.iOS.Device.SetNoBackupFlag( path );
#endif
    }
}

UnityEngine.iOS.Device.SetNoBackupFlag を使用する