If you like the idea of a portable RAID drive and your PC has a Thunderbolt interface, you’ll want to check out Western Digital’s My Passport Pro.
Like Seagate’s Backup Fast Plus, this drive comes from the factory configured to operate its two internal drives in RAID 0. Unlike Seagate’s product, however, you can reconfigure the drive to operate in a more data-safe RAID 1 configuration.
In this scenario, the drive’s controller writes all the data to both drives at the same time. So if one drive should fail, you can recover everything from the other.
On the downside, the $430 My Passport Pro is thicker and heavier than Seagate’s offering, being 1.74 inches thick and weighing 1.59 pounds. WD also offers a $300 2TB SKU that’s slightly thinner and lighter: 1.13 inches thick and 1.01 pounds.
Both models come with an integrated Thunderbolt cable.