Backup Sitecore Media Library items with a PowerShell script

 $dataFolder = "C:\inetpub\wwwroot\<YOUR_SITE>\Data" $mediaLibraryRootPath = "master:/sitecore/media library" $location = $mediaLibraryRootPath $dateTime = Get-Date -format "yyyy-MM-d_hhmmss" $zipName = "Backup Media Library Example" $zipPath = "$dataFolder/$zipName-$datetime.zip" function BackupMediaItems { [System.Reflection.Assembly]::Load("WindowsBase,Version=3.0.0.0, ` Culture=neutral, PublicKeyToken=31bf3856ad364e35") | Out-Null $ZipPackage=[System.IO.Packaging.ZipPackage]::Open($zipPath, ` [System.IO.FileMode]::OpenOrCreate, [System.IO.FileAccess]::ReadWrite) $items = gci -recurse $sourceDir [byte[]]$buff = new-object byte[] 40960 $items = Get-ChildItem -Path $location -Recurse | Where-Object { $_.TemplateID -ne [Sitecore.TemplateIDs]::MediaFolder } $i = 0 foreach($item in $items) { $i = $i + 1 if([Sitecore.Resources.Media.MediaManager]::HasMediaContent($item)) { Write-Output "$($i). $($item.ItemPath)" $mediaItem = New-Object "Sitecore.Data.Items.MediaItem" $item; $mediaStream = $mediaItem.GetMediaStream(); $fileName = Resolve-Path -Path $item.ProviderPath -Relative $nm = $item.Name + "." + $item.Extension $fileName = "$fileName.$($item.Extension)" ` -replace "\\","/" -replace "./", "/" # Print out the file - the list will show up once the file is downloaded "Added: $fileName" # Show progress for the operation Write-Progress -Activity "Zipping Files " `  -CurrentOperation "Adding $fileName" `  -Status "$i out of $($items.Length)" `  -PercentComplete ($i *100 / $items.Length) $partUri = New-Object System.Uri($fileName, [System.UriKind]::Relative) $partUri = [System.IO.Packaging.PackUriHelper]::CreatePartUri($partUri); $part = $ZipPackage.CreatePart($partUri, `  "application/zip", `  [System.IO.Packaging.CompressionOption]::Maximum) $stream=$part.GetStream(); do { $count = $mediaStream.Read($buff, 0, $buff.Length) $stream.Write($buff, 0, $count) } while ($count -gt 0) #Out-Download -Name $nm -InputObject $stream $stream.Close() $mediaStream.Close() } } $ZipPackage.Close() } BackupMediaItems