A small PowerShell script to save Windows 10 lock screen images to a more accessible location.

Get-SpotlightImages.ps1

$files = gci $Env:LocalAppData\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\LocalState\Assets |
    where Length -gt 1kb
if ($files) {
    $shell = New-Object -ComObject Shell.Application
    $folder = "$Env:USERPROFILE\Pictures\Spotlight"
    if (!(Test-Path $folder)) { mkdir $folder }
    $files | % {
        $_ | Copy-Item -Destination $folder\$_.jpg
        Get-Item $folder\$_.jpg
    } | % {
        $namespace = $shell.namespace($folder)
        $item = $namespace.ParseName($_.Name)
        $size = $namespace.GetDetailsOf($item, 31)
        if ($size -match '(\d+) x (\d+)') {
            $width = [int]($Matches[1])
            $height = [int]($Matches[2])
        }
        if (!$size -or $width -lt 500 -or $height -lt 500) {
            Remove-Item $_
        }
    }
}

Line 5 can be changed to $Folder = [ System.Environment ]:: GetFolderPath('MyPictures') + '\Spotlight' ;, so even if the user change the Pictures location it will save correctly.

thanks for this
works perfectly well
well done

Thank you so much! The script not only copies the files and adds the file extension, but also selects only those images that are likely to be a desktop wallpaper!

Here is an online tool:
https://1ocalhost.github.io/win10-lock-screen-spotlight.html