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copied!<p>I amended the code from stej (which was great, just what i needed!) to use larger buffer, [long] for larger files and used System.Diagnostics.Stopwatch class to track elapsed time and estimate time remaining.</p> <p>Also added reporting of transfer rate during transfer and outputting overall elapsed time and overall transfer rate.</p> <p>Using 4MB (4096*1024 bytes) buffer to get better than Win7 native throughput copying from NAS to USB stick on laptop over wifi.</p> <p>On To-Do list:</p> <ul> <li>add error handling (catch) </li> <li>handle get-childitem file list as input</li> <li>nested progress bars when copying multiple files (file x of y, % if total data copied etc)</li> <li>input parameter for buffer size</li> </ul> <p>Feel free to use/improve :-)</p> <pre><code>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.Split("\")|select -last 1) ` -PercentComplete 0 try { $sw = [System.Diagnostics.Stopwatch]::StartNew(); [byte[]]$buff = new-object byte[] (4096*1024) [long]$total = [long]$count = 0 do { $count = $ffile.Read($buff, 0, $buff.Length) $tofile.Write($buff, 0, $count) $total += $count [int]$pctcomp = ([int]($total/$ffile.Length* 100)); [int]$secselapsed = [int]($sw.elapsedmilliseconds.ToString())/1000; if ( $secselapsed -ne 0 ) { [single]$xferrate = (($total/$secselapsed)/1mb); } else { [single]$xferrate = 0.0 } if ($total % 1mb -eq 0) { if($pctcomp -gt 0)` {[int]$secsleft = ((($secselapsed/$pctcomp)* 100)-$secselapsed); } else { [int]$secsleft = 0}; Write-Progress ` -Activity ($pctcomp.ToString() + "% Copying file @ " + "{0:n2}" -f $xferrate + " MB/s")` -status ($from.Split("\")|select -last 1) ` -PercentComplete $pctcomp ` -SecondsRemaining $secsleft; } } while ($count -gt 0) $sw.Stop(); $sw.Reset(); } finally { write-host (($from.Split("\")|select -last 1) + ` " copied in " + $secselapsed + " seconds at " + ` "{0:n2}" -f [int](($ffile.length/$secselapsed)/1mb) + " MB/s."); $ffile.Close(); $tofile.Close(); } } </code></pre>

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