Thanks to the advent and proliferation of SSD technology, external hard drives are becoming faster, more convenient, and in some cases cheaper. It's easy now to get a whopping 10 TB in a regular hard drive for the price of a 2 TB SSD card. So which hard drive should you turn to when your computer is overflowing with MP3s and WMVs? It depends on your priorities. Are you planning to tote your data collection around with you? Do you have a staggering amount of data you simply want to back up? Or are you looking to augment your laptop so that you can constantly call on your collection of digital entertainment? The answers to those questions will help you decide which hard drive is right for you. Here are four hard drives we think can help best meet your needs.