"Script" to move files from subfolders to an out folder.... Windows 10 sucks and is full of bugs.... Win 8 wouldn't need.....

moveFiles.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BatchMove
{
    class Program
    {
        static void Main(string[] args)
        {
            string rootFolder = @"C:\Users\Allan\Desktop\New folder";
            string outFolder = @"C:\Users\Allan\Desktop\New folder (2)";

            MoveAll(rootFolder, outFolder, true);

        }

        private static void MoveAll(string inFolder, string outFolder, bool overwriteSameName, bool getSubDir = true, string pattern = "*.*")
        {
            var files = Directory.GetFiles(inFolder, "*.*");

            foreach (string f in files)
            {
                FileInfo fi = new FileInfo(f);

                string newPath = Path.Combine(outFolder, fi.Name);

                if (File.Exists(newPath))
                {
                    if (overwriteSameName)
                    {
                        File.Delete(newPath);
                    }
                    else
                    {
                        int i = 0;

                        do
                        {
                            newPath = Path.Combine(outFolder, fi.FullName.Replace(fi.Extension, i + "." + fi.Extension));
                            i++;
                        }
                        while (File.Exists(newPath));
                    }
                }

                fi.MoveTo(newPath);
            }

            if (getSubDir)
            {
                var dirs = Directory.GetDirectories(inFolder);

                foreach (var d in dirs)
                {
                    MoveAll(d, outFolder, overwriteSameName, true, pattern);
                }
            }
        }

    }
}