There's rarely a safe and convenient place to put a portable external hard drive when using a laptop in a mobile, non-desk situation.
Example: You're working on your laptop and want to back up some files or work on some media that you have stored on an external drive. You pull it out of your bag and look around. If you're on a plane or train, at a coffee shop with a teensy-tiny bistro table, or lounging outside on a patio, you'll quickly realize there's no convenient place to put the external drive and be assured that while in operation it will be safe from liquid spills, getting whacked, or falling off of your lap or miniature workspace.
Adhesive-backed velcro strips.
A Geek Factor of 6/10 - This isn't for the fashion-conscious or those wishing to keep their laptop un-customized.
WHAT YOU NEED TO DO THIS:
# 15 minutes
# Velco or other brand hook-and-loop adhesive-backed fastener strips. (comes in rolls or pre-cut lengths)
# Paper towel or clean cloth.
# Scissors (with which to cut the velcro to size)
# Pencil (to mark and measure the velcro)
# Isopropyl Rubbing Alcohol or other grease-removing, residue-free cleaning agent.
# Portable External Hard Drive (or WiFi / wireless dongle, CD-Rom, tethered smartphone, etc)
New Material Cost: Under $10