Much easier if you want to sit in just a chair. Or for moving from room to room. Its velcro so its easy to swap things too!
Step 1: Just Velcro!
:warning: use a hard drive that is designed to withstand movement. From my understanding some older externals get damaged easily if they are moved while powered. An SSD would be perfect but i have an SSHD so i guess its half ok :P
Apply sticky industrial strength velcro to a corner of the top of your laptop screen so that when closed is close to the desired usb port. I like to apply the fluffy side on the Hard drive and the the clinging side on the roof of the laptop since the clingy side has a cleaner look.
Step 2: Done
Now you can sit in a chair and not worry about where to put an external. :)
Share your thoughts in the comments if u'd like