FileUtil.CopyFileOrDirectory

Description

Copies a file or a directory.

This function's path can be relative to the project root folder or be an absolute path.

All file separators should be forward ones "/".

Make sure to include the name of the files or directories at the end of the "to" argument.

using UnityEngine;
using UnityEditor;

public class CopyFile : MonoBehaviour
{
    [MenuItem("Example/Copy Something")]
    static void CopySomething()
    {
        FileUtil.CopyFileOrDirectory("sourcepath/YourFileOrFolder", "destpath/YourFileOrFolder");
    }
}