Version: 2018.2

EditorUtility.OpenFilePanelWithFilters

Switch to Manual
public static string OpenFilePanelWithFilters (string title, string directory, string[] filters);

Parameters

titleTitle for dialog.
directoryDefault directory.
filtersFile extensions in form { "Image files", "png,jpg,jpeg", "All files", "*" }.

Description

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