$startFolder = "D:/"$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 / 1GB) $Unit='GB' if($FileSize -lt 1) {  $FileSize="{0:N2}" -f ($subFolderItems.sum / 1MB)  $Unit='MB' } write-host $i.FullName ' -- ' $FileSize $Unit -fore green}