Rugged, portable, and trendy, external solid-state drives (SSDs) are the obvious path these days to netting fast extra storage for your PC or Mac.

The SanDisk Extreme 900 Portable SSD is a versatile, higher-capacity solid-state drive (SSD) that can take its fair share of knocks.

The Adata DashDrive Elite HE720 (500GB) external hard drive bundles strong performance with a lovely design, but its higher price-per-gigabyte ratio, short cable, and lackluster software gives us pause.