batch file script doesn't work in xp - batch-file

Question

i want to make an auto backup script for my office. i've do some research and finally get some light bulb, but the problem is that my code just work in Windows 7 and won't work in Windows XP. so how do i solve this? Here is my code
echo off
setlocal enabledelayedexpansion
:FIND.BACKUP.DRIVE.LETTER
set start.dir=%systemdrive%
J:
%cls%
if not "%cd:~0,2%"=="%start.dir%" goto next
I:
%cls%
if not "%cd:~0,2%"=="%start.dir%" goto next
H:
%cls%
if not "%cd:~0,2%"=="%start.dir%" goto next
G:
%cls%
if not "%cd:~0,2%"=="%start.dir%" goto next
if "%cd:~0,2%"=="%start.dir%" (
echo WAITING FOR FLASH MEDIUM TO BE CONNECTED . . .
if exist "%windir%\system32\timeout.exe" timeout /t 1 /nobreak >nul
if not exist "%windir%\system32\timeout.exe" pause
goto FIND.FLASH.DRIVE.LETTER
)
:next
set start.hour=%time:~0,2%
set start.min=%time:~3,2%
REM FLASH.DRIVE IS THE FLASH DRIVE.
set flash.drive=%cd:~0,2%
set date="%date:~7,2%-%date:~4,2%-%date:~10,4%"
mkdir "%userprofile%\desktop\a\%date%"
xcopy "%flash.drive%\*.*" /s /c /d /e /h /i /r /y %userprofile%\desktop\a\%date%
if not exist %flash.drive% set /a total.time=((((%time:~0,2%-%start.hour%)... && echo Flash Drive has been in for !total.time! minutes. && Pause>nul
#pause
thanks

Answer 1

This should be reliable, to do the same task.
Are you sure that you need the /d switch in xcopy?
#echo off
:loop
echo waiting... Please insert the flash drive...
ping -n 3 "" >nul
set "drv="
for %%a in (g h i j) do if exist "%%a:\" set "drv=%%a:"
if not defined drv goto :loop
REM drv IS THE FLASH DRIVE.
set start.hour=%time:~0,2%
set start.min=%time:~3,2%
set "d8=%date:~7,2%-%date:~4,2%-%date:~10,4%"
xcopy "%drv%\*.*" /s /c /d /e /h /r /y "%userprofile%\desktop\a\%d8%\"
set end.hour=%time:~0,2%
set end.min=%time:~3,2%
pause
I believe your calculation of total time is broken, and is something that you can work on.