@echo off
set driver=e
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "可用字节"') do set c=%%c
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "可用字节"') do set d=%%d
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "可用字节"') do set e=%%e
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "可用字节"') do set f=%%f
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "可用字节"') do set g=%%g
for /f "tokens=1-10 delims=, " %%a in ('dir %driver%: ^| find "可用字节"') do set h=%%h
echo %d% | find "字节" >nul
if %ERRORLEVEL% neq 0 goto nexte
set space=%c%
:nexte
echo %e% | find "字节" >nul
if %ERRORLEVEL% neq 0 goto nextf
set space=%c%%d%
set /a space=%space%/1024/1024
:nextf
echo %f% | find "字节" >nul
if %ERRORLEVEL% neq 0 goto nextg
set space=%c%%d%%e%
set /a space=%space%/1024/1024
:nextg
echo %g% | find "字节" >nul
if %ERRORLEVEL% neq 0 goto nexth
set space=%d%%e%%f%
set /a space=%space%/1024/1024
set t=%c%
set /a t=%t%*953
set /a space=%space%+%t%
:nexth
echo %h% | find "字节" >nul
if %ERRORLEVEL% neq 0 goto nextx
set space=%c%%d%%e%%f%%g%
set space=%d%%e%%f%
set /a space=%space%/1024/1024
set t=%c%%d%
set /a t=%t%*953
set /a space=%space%+%t%
:nextx
echo %driver%:=%space%M___FREE
echo 按任意键退出... && pause>nul