代码如下很实用

powershell
Get-ChildItem C:\ -Recurse -File -ErrorAction SilentlyContinue | Where-Object { $_.Length -gt 100MB } | Sort-Object Length -Descending | Select-Object Name, @{Name="Size(MB)";Expression={[math]::Round($_.Length/1MB,2)}}, FullName | Export-Csv E:\bigfiles.csv -NoTypeInformation -Encoding UTF8

以下是自定义路径和代码，另存为ps1文件注意utf8带签名

powershell
# 切换到UTF-8编码
chcp 65001 > $null

do {
    $pathInput = Read-Host "请输入要扫描的路径 (例如 C:\Users)"
    $path = [System.IO.Path]::GetFullPath($pathInput.Trim())
    $validPath = Test-Path $path
    if (-not $validPath) {
        Write-Host "路径不存在！请输入有效路径。" -ForegroundColor Red
    }
} while (-not $validPath)

do {
    $sizeMB = Read-Host "请输入要过滤的最小文件大小 (单位MB，例如 100)"
    $validInput = [int]::TryParse($sizeMB, [ref]$null) -and [int]$sizeMB -ge 0
    if (-not $validInput) {
        Write-Host "请输入有效的非负数！" -ForegroundColor Red
    }
} while (-not $validInput)

$sizeBytes = [int]$sizeMB * 1048576

$bigFiles = Get-ChildItem $path -Recurse -File -ErrorAction SilentlyContinue | Where-Object { $_.Length -gt $sizeBytes } | Sort-Object Length -Descending | Select-Object Name, @{Name="Size(MB)";Expression={[math]::Round($_.Length/1MB,2)}}, FullName

if ($bigFiles) {
    Write-Host "在 $path 中找到大文件：" -ForegroundColor Green
    $bigFiles | Format-List
    $bigFiles | Export-Csv E:\bigfiles.csv -NoTypeInformation -Encoding UTF8
    Write-Host "CSV 已保存到 E:\bigfiles.csv" -ForegroundColor Green
} else {
    Write-Host "在 $path 中未找到大于 $sizeMB MB 的文件" -ForegroundColor Yellow
}

以下是同等功能的Python代码，效率比Powershell低一些

python
import os
import csv
from pathlib import Path

def get_valid_path():
    """提示用户输入路径并校验"""
    while True:
        path = input("请输入要扫描的路径（例如 C:\\Users）：").strip()
        # 规范化路径（支持斜杠、反斜杠）
        path = str(Path(path).resolve())
        if os.path.exists(path):
            return path
        print("\033[91m路径不存在！请输入有效路径。\033[0m")

def get_valid_size():
    """提示用户输入文件大小并校验"""
    while True:
        size_mb = input("请输入要过滤的最小文件大小（单位MB，例如 100）：").strip()
        try:
            size_mb = float(size_mb)
            if size_mb >= 0:
                return size_mb
            print("\033[91m请输入有效的非负数！\033[0m")
        except ValueError:
            print("\033[91m请输入有效的非负数！\033[0m")

def scan_big_files(path, size_mb):
    """扫描大于指定大小的文件"""
    size_bytes = int(size_mb * 1024 * 1024)  # MB转字节
    big_files = []
    
    # 递归扫描
    for root, _, files in os.walk(path, onerror=lambda e: None):
        for file in files:
            file_path = os.path.join(root, file)
            try:
                file_size = os.path.getsize(file_path)
                if file_size > size_bytes:
                    big_files.append({
                        "Name": file,
                        "Size(MB)": round(file_size / (1024 * 1024), 2),
                        "FullName": file_path
                    })
            except (OSError, PermissionError):
                continue  # 跳过无权限或坏文件
    
    # 按大小降序排序
    return sorted(big_files, key=lambda x: x["Size(MB)"], reverse=True)

def main():
    # 获取输入
    path = get_valid_path()
    size_mb = get_valid_size()
    
    # 扫描
    big_files = scan_big_files(path, size_mb)
    
    # 输出结果
    if big_files:
        print("\033[92m在 {} 中找到大文件：\033[0m".format(path))
        # 屏幕打印
        for file in big_files:
            print(f"Name      : {file['Name']}")
            print(f"Size(MB)  : {file['Size(MB)']}")
            print(f"FullName  : {file['FullName']}")
            print()
        
        # 生成CSV
        csv_file = "E:\\bigfiles.csv"
        with open(csv_file, "w", newline="", encoding="utf-8-sig") as f:
            writer = csv.DictWriter(f, fieldnames=["Name", "Size(MB)", "FullName"])
            writer.writeheader()
            writer.writerows(big_files)
        print("\033[92mCSV 已保存到 {}\033[0m".format(csv_file))
    else:
        print("\033[93m在 {} 中未找到大于 {} MB 的文件\033[0m".format(path, size_mb))

if __name__ == "__main__":
    main()