Speed over silence, basically. At 7,200 rpm it's quicker than the 5,400 rpm crowd, and it'll suit a small box that lives out of earshot. It's CMR, which is what you want anywhere near a RAID or ZFS rebuild.
!Watch out for
Bigger box than that? Look at a pro or data-centre line instead. You get three years' cover and a 180 TB a year workload rating, both on the light side if the pool's busy every day.
No Backblaze failure rate for this one. They don't run enough of them, if any, for a figure worth quoting. Power draw is 3.77 W idle and 7.38 W working on Toshiba's figures, or 33 kWh a year if it spends the whole year idling. Four of them in SHR or RAID 5 give 42 TB usable, or 38.2 TB once Windows has done its binary maths on it.
Specifications
Each value links to the Toshiba page or datasheet it came from.