If you want a speedy, compact external drive with an ample warranty and excellent backup software, My Passport Ultra is a good option. The two-tone plastic shell is our only big complaint.
One of the fastest bus-powered hard drives we've tested; Simple; useful backup software that works with non-WD drives and Dropbox; Three-year warranty
Costs a bit more than competing drives at 1TB capacity; Plastic shell doesn't look or feel overly rugged; Seagate Backup Plus drives are more versatile