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SharePoint Online: PowerShell to Download All Files from a Document Library

Requirement: PowerShell to download all files from a SharePoint Online document library.
 
SharePoint Online: Download All Files from a Library using PowerShell CSOM
Why PowerShell? Because, Explorer view didn't work!
#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-FilesFromLibrary()
{ 
    param
    (
        [Parameter(Mandatory=$true)] [string] $SiteURL,
        [Parameter(Mandatory=$true)] [string] $LibraryName,
        [Parameter(Mandatory=$true)] [string] $TargetFolder
    )

    Try {
        #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 all files from the Library
        $List = $Ctx.Web.Lists.GetByTitle($LibraryName)
        $Ctx.Load($List)
        $Ctx.ExecuteQuery()
        
        #Get Files from the Folder
        $Folder = $List.RootFolder
        $FilesColl = $Folder.Files
        $Ctx.Load($FilesColl)
        $Ctx.ExecuteQuery()

        Foreach($File in $FilesColl)
        {
            $TargetFile = $TargetFolder+$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)
            $WriteStream.Close()
        }
        Write-host -f Green "All Files from Library '$LibraryName' Downloaded to Folder '$TargetFolder' Successfully!" $_.Exception.Message
  }
    Catch {
        write-host -f Red "Error Downloading Files from Library!" $_.Exception.Message
    }
}

#Set parameter values
$SiteURL="https://crescent.sharepoint.com/sites/sales/"
$LibraryName="Documents"
$TargetFolder="C:\Documents\"

#Call the function to download file 
Download-FilesFromLibrary -SiteURL $SiteURL -LibraryName $LibraryName -TargetFolder $TargetFolder
This PowerShell script downloads all files from library. What if your Library has Sub-Folders?

Download All Files including Sub-Folders from Library using PowerShell:
Lets download file from SharePoint online using PowerShell including files from all sub-folders.
#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-AllFilesFromLibrary()
{ 
    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-AllFilesFromLibrary -SiteURL $SiteURL -SourceFolder $Folder -TargetFolder $TargetFolder
            }
        }
  }
    Catch {
        write-host -f Red "Error Downloading Files from Library!" $_.Exception.Message
    }
}

#Set parameter values
$SiteURL="https://crescent.sharepoint.com/sites/sales/"
$LibraryName="Documents"
$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 Library
$List = $Ctx.Web.Lists.GetByTitle($LibraryName)
$Ctx.Load($List)
$Ctx.Load($List.RootFolder)
$Ctx.ExecuteQuery()


#Call the function to download file 
Download-AllFilesFromLibrary -SiteURL $SiteURL -SourceFolder $List.RootFolder -TargetFolder $TargetFolder
SharePoint Online: PowerShell to Download All Files from a Document Library SharePoint Online: PowerShell to Download All Files from a Document Library Reviewed by Salaudeen Rajack on March 29, 2017 Rating: 5

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