Rename all files on two depths to their MD5 hash and remove the originals.

mary.ps1

$path = $args[0]
$files = (Get-ChildItem $path -File)

foreach($file in $files){
    $extension = $file.Extension
    $newName = (Get-FileHash -LiteralPath $file.FullName -Algorithm MD5).Hash.toLower()
    $directory = $file.Directory.FullName
    $newPath = "$directory\$newName$extension"

    if(-not ($file.FullName -eq $newPath)){
        Move-Item -Force -LiteralPath $file.FullName -Destination $newPath
    }
}