User blog comment:BobTheDoctor27/Urgent Inactivity News/@comment-1233616-20121125133800/@comment-5174759-20130728100725

I think that's the right way to do it. You should open the external HDD in a sandbox before that and then run an antivirus program on it to be sure nothing is copied on that. I'm not entirely sure how that works since I never got a virus like this, but there are many people out there who know how to do that :(