Remove Unknown SIDs From NTFS Folder That Have Inheritance Disabled

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#Author = Bered
#Created 19/01/2021
#Name = Remove Unknown SIDs
#Purpose - Find and remove and unknown SIDs (S-1-5-*) from a specific folder and subfolder.

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$Folders = Get-ChildItem '#>FILE PATH HERE<#' -Recurse
foreach($Folder in $folders)
    {
    $Path = $folder.FullName
    $ACLSearch = Get-Acl -Path $Path
    foreach($ACL in $ACLSearch)
        {
        IF ( $ACL.Access.IsInherited -eq $false -and $ACL.Access.IdentityReference -like "S-1-5-*")
            {
            Write-Host $Path
            $Rule = $ACL.Access | ?{ $_.IsInherited -eq $false -and $_.IdentityReference -like "S-1-5-*"}
            Foreach ($SubRule in $Rule)
                {
                $acl.RemoveAccessRule($Subrule) | Out-Null
                Set-Acl -Path $Path -AclObject $ACL | Out-Null
                 }
            }
        }
    }