This script copies files downloaded by windows spotlight. For years I have had Windows background drawn from users\public\pictures\sample pictures, so this adds the spotlight ones to that location by default.

Copy-Spotlight.ps1

<#
.Synopsis
    Copies images downloaded by Windows Spotlight
#>
[cmdletbinding()]
param (
    #Where to send JPEGS which are Landscape format e.g ~\AppData\Roaming\Microsoft\Teams\Backgrounds\Uploads
    $LandScapeDestination = "C:\users\Public\Pictures\Sample Pictures",
    #Where to send JPEGS which are portrait format 
    $PortraitDestination  = "C:\Users\Public\Pictures\Portrait Samples" 
) 
    #Get hashes of exisiting images so if name changes we don't duplicate the file
    Get-ChildItem -File -Path $LandScapeDestination,$PortraitDestination | 
        Get-FileHash -Algorithm md5 | 
            ForEach-Object -Begin {$hh=@{}} -Process {$hh[$_.hash] = $true  } 

    #Image object used to check each file IS an image (if not we will skip it) and its dimensions
    $image  = New-Object -ComObject Wia.ImageFile  

    <#
     Expect to find Windows Spotlight files in 
    "$Env:USERPROFILE\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\LocalState\Assets"
    Files have NO extension but are JPEGS, but not everything in the folder is a JPEG or Background size  
    Allow for Content delivery manager to change its unique ID
    #>
    $Path = (Get-Item -Path "~\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager*").FullName
    
    # Get files from there weeding out anything smaller than 50K or already copied
    Get-ChildItem -Path "$path\LocalState\Assets" | 
        Where-Object {($_.length -GT 50Kb) -and 
                       -not ((Test-Path "$LandScapeDestination\$($_.name).jpg") -or 
                             (Test-Path "$PortraitDestination\$( $_.name).jpg") ) } | 
            Where-Object {-not $hh[(Get-FileHash $_)]} | ForEach-Object {
                #Ensure the file is an image more than 1000 pixels wide; copy portrait and landscape files to their own destinations
                try   {
                    $image.LoadFile($_.FullName) 
                    if     ($image.Width -lt 1000) {Write-Verbose -Message "$($_.name) Skipped as too small, width=$($image.Width), Height=$($image.Height)"}
                    elseif ($image.Width -ge $image.Height) { 
                          Copy-Item -Path $_.FullName -Destination ( Join-path -Path $LandScapeDestination -ChildPath ($_.name +".jpg")) -Verbose
                    }
                    else {Copy-Item -Path $_.FullName -Destination ( Join-path -Path $PortraitDestination  -ChildPath ($_.name +".jpg")) -Verbose }
                }
                catch {   Write-verbose -Message "Couldn't process $($_.Name)" }
    }