Add-Copy.ps1

function Add-Copy {
	param (
		[Parameter(
			Mandatory = $true,
			Position = 0,
			HelpMessage = "The path of the file to clone."
		)]
		[ValidateNotNullOrWhiteSpace()]
		[string]$OriginalFilePath,

		[Parameter(
			Mandatory = $true,
			Position = 1,
			HelpMessage = "The number of copies to create."
		)]
		[ValidateRange(2, [int]::MaxValue)]
		[int]$NumberOfCopies,

		[Parameter(
			Mandatory = $false,
			Position = 2,
			HelpMessage = "The destination directory where copies will be placed."
		)]
		[ValidateNotNullOrWhiteSpace()]
		[string]$DestinationDirectory
	)

	if (-not (Test-Path $OriginalFilePath)) {
		Write-Output "The file '$OriginalFilePath' does not exist."
		return
	}

	if (-not $DestinationDirectory) {
		$DestinationDirectory = Split-Path $OriginalFilePath -Parent
	}

	if (-not (Test-Path $DestinationDirectory)) {
		Write-Output "The folder '$DestinationDirectory' does not exist."
		return
	}

	$fileName = [System.IO.Path]::GetFileNameWithoutExtension($OriginalFilePath)
	$fileExtension = [System.IO.Path]::GetExtension($OriginalFilePath)

	for ($i = 1; $i -le $NumberOfCopies; $i++) {
		$newFileName = "{0}{1}{2}" -f $fileName, $i, $fileExtension
		$destinationFilePath = Join-Path -Path $DestinationDirectory -ChildPath $newFileName

		Copy-Item -Path $OriginalFilePath -Destination $destinationFilePath
	}
}