CMedialib::GetUsableSize

static function GetUsableSize($size = 0)
{
	$size = intval($size);
	if ($size < 1024)
		return $size." ".GetMessage('ML_BYTE');

	$size = round($size / 1024);
	if ($size < 1024)
		return $size." K".GetMessage('ML_BYTE');

	$size = round($size / 1024);
	if ($size < 1024)
		return $size." M".GetMessage('ML_BYTE');

	return $size;
}