In this article in the series, Robert Sheldon provides a deep dive into HDDs.
Hard Drive 101 Basics Guide - Secure Data Recovery Services
Computer Storage Devices. What is a computer storage device?, by Nelie munasinghe
Hard Disk Photos and Images
Disk partitioning - Wikipedia
Hard disk drive - Wikipedia
Storage 101: Understanding the Hard-Disk Drive - Simple Talk
Solid State Drives 101: Everything You Ever Wanted to Know
Disk read-and-write head - Wikipedia
Computer Storage Devices. Definition, by Tharinduprabathjayapathma
How to Upgrade Your Computer: Migrating from HDD to SDD
20 Things You Didn't Know About Hard Disk Drive
Storage and Hard Drives 101