[greg zakharov]

Код:

#requires -version 4
$wc = New-Object Net.WebClient
[Management.Automation.PSCredential]$pc = Get-Credential -UserName user -Message 'Загрузка данных на ftp'
$wc.Credentials = $pc.GetNetworkCredential()

Get-ChildItem D:\folder_for_sync\*.zip | % {
  [Uri]$uri = 'ftp://ftp_server/' + $_.Name
  $wc.UploadFile($uri, $_.FullName)
}

$wc.Dispose()