Unity - Scripting API: EditorUtility.OpenFolderPanel

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Declaration

public static string OpenFolderPanel(string title, string folder, string defaultName);

Parameters

Parameter	Description
title	The text to display in the title bar of the dialog window.
folder	The default file directory that this dialog opens. This parameter is relative to the project directory. For example, "Assets" displays the Assets directory when this dialog opens.
defaultName	The default name to name the folder. Can be an empty string.

Returns

string The fully qualified path to a folder.

Description

Displays the "open folder" dialog and returns the selected path name.

using UnityEditor;
using System.IO;public class OpenFolderPanelExample : EditorWindow
{
    [MenuItem("Example/Load Textures To Folder")]
    static void Apply()
    {
        string path = EditorUtility.OpenFolderPanel("Load png Textures", "", "");
        string[] files = Directory.GetFiles(path);
        foreach (string file in files)
            if (file.EndsWith(".png"))
                File.Copy(file, EditorApplication.currentScene);
    }
}