Powershell copy with streams RRS feed

  • Question

  • Hello,

    I am using the following to copy items in powershell as the lack of a progress bar for Copy-Item was noticed:

    function Copy-File {
        param( [string]$from, [string]$to)
        $ffile = [io.file]::OpenRead($from)
        $tofile = [io.file]::OpenWrite($to)
        Write-Progress -Activity "Copying file" -status "$from -> $to" -PercentComplete 0
        try {
            [byte[]]$buff = new-object byte[] 4096
            [long]$total = [long]$count = 0
            do {
                $count = $ffile.Read($buff, 0, $buff.Length)
                $tofile.Write($buff, 0, $count)
                $total += $count
                if ($total % 1mb -eq 0) {
                    Write-Progress -Activity "Copying file" -status "$from -> $to" `
                       -PercentComplete ([int]($total/$ffile.Length* 100))
            } while ($count -gt 0)
        finally {
            Write-Progress -Activity "Copying file" -Status "Ready" -Completed

    However does anyone know of a better way of doing this that will have the ability to copy files & folders? Or any other features that are important (e.g. check if the file successfully transferred, connects if the connections drops etc...) I dont want to use programs outside of powershell itself (so no robocopy for example) 

    I am using it to copy files from a local machine to a remote share on another windows machine. 

    Monday, June 3, 2019 8:40 PM


All replies

  • Also, Start-BitsTransfer will display a progress bar.

    Monday, June 3, 2019 8:47 PM
  • I've never actually used Bits, are there any drawbacks to using it that you can think of?
    Monday, June 3, 2019 8:49 PM
  • Not that I know of.
    Monday, June 3, 2019 8:58 PM
  • RoboCopy does this faster and with all options in one line.  It is also multi-threaded.


    Monday, June 3, 2019 10:01 PM
  • Hi,

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    Best Regards,


    Just do it.

    Friday, June 14, 2019 6:26 AM