[Kazun]

Код:

Get-ChildItem $Path -Recurse -include *.jpg, *.png, *.gif | ? {!$_.PSIsContainer} | copy-Item -Destination {
	$folder = "$dest\$($_.LastWriteTime.ToString("yyyy"))"
	md $folder -Force | Out-Null
	$fpath = Join-Path $folder $_.Name
	$i = 1
	while($true) {
		if (Test-Path $fpath) {
			$fpath = "{0}\{1}_{2}{3}" -f $folder,$_.basename,$i,$_.extension
			$i++
		}
		else {
			$fpath
			break
		}
	}
}