For every hard drive, we ran HD Tune Guru, a benchmarking program that tests transfer speeds, access time, burst speed, and CPU usage across the whole disk. We also timed a streak of file transfers–a 7.07 GB folder of photos, a 19.7 GB music series, and a 45.5 GB tear of a Blu-ray movie–from begin to finish, running every transfer three times and determining the average to rule out performance hiccups. We explored each drive’s bundled software to learn how useful and user-friendly it is.
For solid-state drives , we utilized CrystalDiskMark and ATTO Disk Benchmark to check every drive’s sequential and random rates, and we completed the exact same set of file transfers we use for hard drives. We ran all of these tests on the Asus ROG G752VT-DH72, our best gaming laptop. Its PCIe solid-state driveway was more than fast enough to prevent bottlenecking all the drives we tested.
It’s also lighter and smaller than the majority of the other hard drives we tested, was consistently faster than the competition in our multifile music and photo transfer evaluations, and it is among the least costly drives each terabyte we analyzed, also. The Slim comes with handy backup software and 200 GB of free OneDrive storage for two decades.
The Slim has been our best pick since April 2014, except to get a three-month period as it had been superseded with its successor, the Seagate Backup Plus Ultra Slim. The Ultra Slim’s reported failure rate has skyrocketed because we began recommending it, so we’ve shifted our pick straight back to the Slim.
Back in January 2017 , we listed 587 failure reports from 8,948 user testimonials for its Slim, providing the Slim a 6.5 percent reported failure rate–that is especially good for a drive that has been in existence for three years. (You can read about how we calculate failure rates in our whole guide.) The two TB version we urge has a much lower failure rate at 5.9 percent. Throughout our years of testing, we have found that anything below 10 percent isn’t cause for concern. That is far from a perfect measure, but it is the best we have for today.