If you are hearing a sequence of decreasing-in-tone beeps over and over after turning your Home Plus drive off - simply unplug the battery. This is a known quirk that affects just a few Plus drives which we are currently investigating. It does not affect performance and does not need to be sent in for repair.
You should always disconnect the battery when not in use - even for just small breaks - so it's something you would do anyway.
If you decide when or if you want send it in for the fireware re-install. You may decide not to send it in at all, or wait until you know you won't miss it for a week or two. Just reach out to support for the RMA# anytime and ask for the firmware re-install.