【無料】ドロップしたフォルダ内のファイルサイズ（容量）をCSV出力するバッチファイル

@echo off
setlocal enabledelayedexpansion

:: Get the current date and time in the YYYYMMDDhhmm format
for /f "tokens=2 delims==" %%a in ('wmic OS Get localdatetime /value') do set "dt=%%a"
set "dt=%dt:~0,12%"

:: Output csv file
set "csvfile=%~dp0%dt%_filesizelist.csv"

:: Write CSV headers
echo FilePath,Size > "%csvfile%"

:: Check if a directory was provided
if "%~1"=="" (
    echo No directory was provided.
    echo Please drag and drop the directory onto this batch file.
    exit /b
)

:: Start from the directory that was dragged and dropped onto this batch file
set "folder=%~1"

:: Loop through all files in the provided directory and its subdirectories
for /r "%folder%" %%F in (*) do (
    for %%A in ("%%F") do (
        set "size=%%~zA"
        echo %%F,!size! >> "%csvfile%"
    )
)

:: Catch potential errors due to insufficient memory or unreadable files
if ERRORLEVEL 1 echo Error occurred while processing: Insufficient memory or unreadable file. >> "%csvfile%"

endlocal