Windows Spotlight has some nice wallpaper and I’d like to keep a couple for later use, so here’s the shortest Powershell script I could make to save them to my Pictures directory:

$src = "$env:LOCALAPPDATA\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\LocalState\Assets"

$dest = "$env:USERPROFILE\Pictures\Windows Spotlight"

Get-ChildItem "$src" | where {$_.length -gt "141160"} | foreach {cp "$src\$_" "$dest\$_.jpg"}

I only copy files greater than 141160 bytes because some files in that directory are not wallpapers and the largest non-wallpaper file is 141160 bytes, so it’s a good starting point.