I have to add the local files to list item as an attachment with PowerShell. While reading the file I got an error "Access Denied" as below-

**Exception calling "ReadAllBytes" with "1" argument(s): "Access to the path 'D:\Projects\Test\List Data\Attachments\3' is denied."

Code Snippet-

$filePath = "D:\Projects\Test\List Data\Attachments\" + $item.ID
$bytes = [System.IO.File]::ReadAllBytes($filePath)

How to fix this?

2 Answers 2


Make sure the current user have access to D:\Projects\Test\List Data\Attachments\ by doing the following

  • Right click in this folder >
  • Select sharing with> provide the user that you have used to run PowerShell.
  • Set permission level to can Read and Write.
  • Try to run the script again, it should be working.


I have noticed that you didn't pass the extension of your file , $filePath = "D:\Projects\Test\List Data\Attachments\" + $item.ID try to concatenate the extension like $filePath = "D:\Projects\Test\List Data\Attachments\" + $item.ID +".the file extension" , maybe this is the reason !

  • I have not used any user to run the powerShell. Windows user Administrator have the full rights to Read and Write.
    – Ram
    Commented Dec 23, 2016 at 6:35
  • are you using SharePoint management shell to run this script ? Commented Dec 23, 2016 at 6:41
  • No, I am using Windows PowerShell ISE.
    – Ram
    Commented Dec 23, 2016 at 6:44
  • in my case, I tried to run SharePoint management shell via farm account and provide the farm account read and write to this folder Commented Dec 23, 2016 at 6:46
  • The user I am using have the full rights!
    – Ram
    Commented Dec 23, 2016 at 6:48

I was missed to iterate the files in the folder, so it gives the error.

The below is the solution which I got from here

        $files = [IO.Directory]::GetFiles($filePath)
        ForEach($file in $files)
        Write-Host "File Name = " $file
        $bytes = [System.IO.File]::ReadAllBytes($file)
        $row.Attachments.Add([System.IO.Path]::GetFileName($file), $bytes)

Hope for the best!

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