@echo off
color f4
echo 特別提醒! 請不要修改C: !&PAUSE>NUL
COLOR 07
cls
    set/p a=請輸入原盤符……  
    set/p b=請輸入新盤符……  
    set old=%a%:
    set new=%b%:
    pushd %new% 2>nul && echo %new%盤已經存在! && pause && goto :eof
    for /f %%i in ('mountvol %old% /l') do set "vol=%%i"
    mountvol %old% /d
    mountvol %new% %vol%
    popd