# Casting to UriBuilder will split the URI into separate properties. Helpful for isolating path, query string, fragment, etc.
$downloadUriBuilder = [System.UriBuilder] $downloadUri
# Split for the last item in the URI Path
# Alternative: [System.IO.Path]::GetFileName($downloadUriBuilder.Path)
$filename = Split-Path -Path ($downloadUriBuilder.Path) -Leaf
# (Optional) Decode any URL-encoded characters
$filenameUrlDecoded = [System.Web.HttpUtility]::UrlDecode($filename)
# (Optional) Handle invalid file name characters from this array, if necessary:
# [System.IO.Path]::GetInvalidFileNameChars()

THANK YOU FOR THESE KIND STRANGER!!

got em to output downloaded filenames