Most people, at least I do, have an offline backup. Mine is a small external hdd, the annoying part is when I have to search for the special cable to get files off or on the drive. I usually leave the cable plugged in since I only use it for the hdd, but sometimes the cable falls behind the computer and it's hard to find.
So I came up with an easy fix, a clip that uses the side panel screw to hold a small clip for the cable. It should work on most cases. Also this remix just has thicker walls so it doesnt break so easily

The dimensions I used for the cable and the screw hole:
-Screw: 3.4mm ø
-Cable: 4mm ø

From testing, the cable sits nicely and is easy to pick up and be placed back. 

Print instructions: print it the orientation it's provided and at 0.10mm layer height.