The top dogs are rarely the cheapest gigabyte/dollar wise. If you look at https://www.backblaze.com/blog/wp-content/uploads/2017/01/Q4-2016-Drive-Failure-Rates.

The top dogs are rarely the cheapest gigabyte/dollar wise. If you look at https://www.backblaze.com/blog/wp-content/uploads/2017/01/Q4-2016-Drive-Failure-Rates.jpg https://www.backblaze.com/blog/wp-content/uploads/2017/01/Q4... you will see their bread-and-butter was still 4TB in 2016 with 8TB slowly introducing.