Solid-state drives – aka SSD – used to be really expensive, but prices have really fallen in the past few years, and you can now pick up fast, reliable SSDs that cost only slightly more than their hard drive counterparts. Even the slowest SSDs are generally faster than mechanical hard drives.
As well as being faster than conventional hard drives, SSDs are lighter and sturdier too, making them ideal for use with a laptop when you’re traveling. That’s reflected in the drives that we review here, most of which are small and light enough to slip into your pocket. However, the latest SSDs can also offer up to 8TB of storage, which makes them a good option for use with a desktop Mac in an office as well. And they can help to reduce cable clutter too, as they generally take their power from a USB port on your Mac, rather than requiring a separate external power supply.
Read more at Macworld.com