Script detects and runs when USB Drive with unique serial number is connected

Script should run when it detects USB drive with specific serial number is just plugged in.

But its giving this error msg:

{ Cannot convert value "Win32_PhysicalMedia='K:'" to type "System.Management.ManagementObject". Error: "Not found " }

Here is the script:

Register-WmiEvent -Class win32_VolumeChangeEvent -SourceIdentifiervolumeChangedo{$newEvent = Wait-Event -SourceIdentifier volumeChange$eventType = $newEvent.SourceEventArgs.NewEvent.EventType$eventTypeName = switch($eventType){1 {"Configuration changed"}2 {"Device arrival"}3 {"Device removal"}4 {"docking"}}if ($eventType -eq 2){$driveLetter = $newEvent.SourceEventArgs.NewEvent.DriveName$driveLabel = ([wmi]"Win32_PhysicalMedia='$driveLetter'").SerialNumberif ($driveLabel -eq '0401541bbf5130dceb26'){    msg * USB IS PLUGGED IN}}Remove-Event -SourceIdentifier volumeChange} while (1-eq1) Unregister-Event -SourceIdentifier volumeChange