How to Download a Folder from SharePoint Online using PowerShell?

Requirement: Download folder from SharePoint Online

How to Download a Folder from SharePoint Online?
To download a folder in SharePoint online, Follow these steps:

• Login to your SharePoint Online Site, Navigate to the Folder you want to download.
• Right click on the Folder  >> Choose "Download" from the context menu. You can also use the "Download" button from the toolbar.
• This brings you a Zip file with the Selected folder and its Sub-Folders and its files.
  
   

Quite simple, huh? Lets see how to download a SharePoint Online folder using PowerShell.

SharePoint Online: Download Folder using PowerShell
Now, when we need to download a folder repeatedly, or automatically on a schedule basis, we can utilize PowerShell. Here is my PowerShell to download a folder from SharePoint Online.  

#Load SharePoint CSOM Assemblies
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.dll"
Add-Type -Path "C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\16\ISAPI\Microsoft.SharePoint.Client.Runtime.dll"
 
Function Download-SPOFolder()
{ 
    param
    (
        [Parameter(Mandatory=$true)] [string] $SiteURL,
        [Parameter(Mandatory=$true)] [Microsoft.SharePoint.Client.Folder] $SourceFolder,
        [Parameter(Mandatory=$true)] [string] $TargetFolder
    )
    Try {
         
        #Create Local Folder, if it doesn't exist
        $FolderName = ($SourceFolder.ServerRelativeURL) -replace "/","\"
        $LocalFolder = $TargetFolder + $FolderName
        If (!(Test-Path -Path $LocalFolder)) {
                New-Item -ItemType Directory -Path $LocalFolder | Out-Null
        }
         
        #Get all Files from the folder
        $FilesColl = $SourceFolder.Files
        $Ctx.Load($FilesColl)
        $Ctx.ExecuteQuery()
 
        #Iterate through each file and download
        Foreach($File in $FilesColl)
        {
            $TargetFile = $LocalFolder+"\"+$File.Name
            #Download the file
            $FileInfo = [Microsoft.SharePoint.Client.File]::OpenBinaryDirect($Ctx,$File.ServerRelativeURL)
            $WriteStream = [System.IO.File]::Open($TargetFile,[System.IO.FileMode]::Create)
            $FileInfo.Stream.CopyTo($WriteStream)
            $WriteStream.Close()
            write-host -f Green "Downloaded File:"$TargetFile
        }
         
        #Process Sub Folders
        $SubFolders = $SourceFolder.Folders
        $Ctx.Load($SubFolders)
        $Ctx.ExecuteQuery()
        Foreach($Folder in $SubFolders)
        {
            If($Folder.Name -ne "Forms")
            {
                #Call the function recursively
                Download-SPOFolder -SiteURL $SiteURL -SourceFolder $Folder -TargetFolder $TargetFolder
            }
        }
     }
    Catch {
        write-host -f Red "Error Downloading Folder!" $_.Exception.Message
    }
}
 
#Set parameter values
$SiteURL="https://crescent.sharepoint.com"
$FolderRelativeUrl ="Shared Documents/Reports"
$TargetFolder="C:\Docs"
 
#Setup Credentials to connect
$Cred= Get-Credential
$Credentials = New-Object Microsoft.SharePoint.Client.SharePointOnlineCredentials($Cred.Username, $Cred.Password)
 
#Setup the context
$Ctx = New-Object Microsoft.SharePoint.Client.ClientContext($SiteURL)
$Ctx.Credentials = $Credentials

#Get the Web
$Web = $Ctx.Web
$Ctx.Load($Web)
$Ctx.ExecuteQuery()
$Web.ServerRelativeUrl+$FolderRelativeUrl
      
#Get the Folder
$SourceFolder = $Web.GetFolderByServerRelativeUrl($Web.ServerRelativeUrl+$FolderRelativeUrl)
$Ctx.Load($SourceFolder)
$Ctx.ExecuteQuery()

#Call the function to download Folder 
Download-SPOFolder -SiteURL $SiteURL -SourceFolder $SourceFolder -TargetFolder $TargetFolder