The Toshiba portable Canvio® Connect USB 3.0 hard drives have been very valuable over the course of our trip. They are light weight plug-and-play, USB powered HDDs which we use daily to back up our photo and video footage files. We carry two 2 TB drives with us and store one in the van and one in the car. This allows added protection of our data in case of accident or theft. (It is not always possible to back-up to the cloud when on the road.)
We find Toshiba drives to be very reliable.