Save SharePoint list attachments to a folder

Here is a powershell script to save SharePoint list attachments to a folder

Add-PsSnapin Microsoft.SharePoint.PowerShell

function downloadListAttachments ( ){
[CmdletBinding()]
 Param(
  [Parameter(Mandatory=$True,Position=1)]
   [string]$siteURL,
   [Parameter(Mandatory=$True)]
   [string]$listName,
   [string]$Path

)

    
    $tempLocation = $Path      
    $w = Get-SPWeb $siteURL   
    $l = $w.Lists[$listName]    
    foreach ($listItem in $l.Items)
    {
          Write-Host "    Content: " $listItem.ID 
           $destinationfolder = $tempLocation         
           if (!(Test-Path -path $destinationfolder))        
                {            
                 $dest = New-Item $destinationfolder -type directory          
                }
           foreach ($attachment in $listItem.Attachments)    
           {     
               $attachment   
               $file = $w.GetFile($listItem.Attachments.UrlPrefix + $attachment)        
               $bytes = $file.OpenBinary()                
               $path = $destinationfolder + "\" + $attachment 
               Write "Saving $path" 
               $fs = New-Object System.IO.FileStream($path, "OpenOrCreate") 
               $fs.Write($bytes, 0 , $bytes.Length)    
               $fs.Close()    
           }
     }
 }
 
downloadListAttachments -siteURL "https://abc" -listName "ListName" -Path "C:\Temp"

Reference : http://bhatiaashish.blogspot.com.au/2012/08/powershell-script-to-download.html