Just don't let him install the external hard drive unsupervised. He could still be using this as a means to put some keylogging software on your computer.
Not trying to be paranoid, but rather going by your initial "wierd vibes" comment, Dudess.
Thanks Puppy. I'll keep watch.
I don't want to be paranoid either. I do get a 'weird vibe', just not sure what that's about.
I don't know much about computers, but I have installed more sophisticated "anti-douchebag" protection systems in my brain to quickly neutralize and quarantine threats to my happiness.