Solid-state drives (SSDs) have fewer moving parts than traditional hard drives, and they offer the speediest access to your data. Hard drives may get you more capacity for your dollar by far, but first you need to consider a major difference in external storage these days: the hard drive versus the SSD.
Weighing the Need for Speed: Hard Drive or SSD?
This guide will help you make sense of all these and many more questions that arise while you're shopping for an external hard drive.