效果图：
核心代码
$startFolder = D:\
$colItems = (Get-ChildItem $startFolder | Where-Object {$_.PSIsContainer -eq $True} | Sort-Object)
foreach ($i in $colItems)
{
$subFolderItems = (Get-ChildItem $i.FullName -recurse | Measure-Object -property length -sum)
$FileSize={0:N2} -f ($subFolderItems.sum /
