Below is the video I used to find all these storage devices. Credit goes to Somewhat Awesome Games, and seriously it is top notch.
There are rewards for finding storage devices:
HF Machete = 10 storage devices
Stun Blade = 20 storage devices
Each data storage unit is broken up by chapter in order of appearance, and labeled accordingly. For example, if you have every one but #6, then this video will tell you where #6 is specifically
If you find this video helpful, go give the kid a thumb's up on youtube.