Need batch program that moves files without copying then deleting them - windows

Question

Every month I have a very large number of files (in many subfolders) in a particular folder. I need to move them all into a different folder. In an attempt to automate the process of moving them I used robocopy in a batch file. It works fine, but takes HOURS to run. (It is many many GB).
Now, if I do it manually in Windows Explorer, by opening said folder, selecting all, and right-dragging to destination folder, and choosing "Move Here", it moves INSTANTLY. (Windows XP must be pruning and grafting the directory entries, without ever making a second copy of the files. ... and yes, source and destination are on same partition.)
So, QUESTION IS: Does anyone know of a program I can run from a batch file to move files in this instantaneous way? (need to move entire sub-folder tree)

Answer 1

You can use MOVE for this:
C:\>MOVE /?
Moves files and renames files and directories.
To move one or more files:
MOVE [/Y | /-Y] [drive:][path]filename1[,...] destination
To rename a directory:
MOVE [/Y | /-Y] [drive:][path]dirname1 dirname2
[drive:][path]filename1 Specifies the location and name of the file
or files you want to move.
destination Specifies the new location of the file. Destination
can consist of a drive letter and colon, a
directory name, or a combination. If you are moving
only one file, you can also include a filename if
you want to rename the file when you move it.
[drive:][path]dirname1 Specifies the directory you want to rename.
dirname2 Specifies the new name of the directory.
/Y Suppresses prompting to confirm you want to
overwrite an existing destination file.
/-Y Causes prompting to confirm you want to overwrite
an existing destination file.
The switch /Y may be present in the COPYCMD environment variable.
This may be overridden with /-Y on the command line. Default is
to prompt on overwrites unless MOVE command is being executed from
within a batch script.
For example:
C:\Users\test>mkdir to
C:\Users\test>move from\*.txt to
C:\Users\test\from\1.txt
C:\Users\test\from\2.txt
2 file(s) moved.

Answer 2

With a point in the right direction from #psmears, and a lot of googling, I found the (or a) solution:
#echo off
setlocal ENABLEDELAYEDEXPANSION
REM ** Change to source dir
L:
cd "L:\Backups\Source"
REM ** Move files recursively
for /R %%G in (.) do (
set mydir=%%G
set mynewdir=!mydir:~18!
md "L:\DEST\!mynewdir!"
cd "L:\DEST\!mynewdir!"
move "%%G\*.*" .
)
REM ** Remove now-empty sub-dir structure inside source
L:
cd "L:\Backups\Source"
for /f "usebackq delims=" %%d in (`"dir /ad/b/s | sort /R"`) do rd "%%d"