It makes most sense when you're chasing terabytes per pound and the NAS sits somewhere noise doesn't matter. Think garage, or a rack in the cupboard under the stairs. Seagate backs it for five years, which is a long time in drive terms. CMR, thankfully. SMR and parity rebuilds don't get on.
!Watch out for
At 7,200 rpm it's from the louder, warmer class. Fine in a cupboard, less fun on a desk.
No Backblaze failure rate for this one. They don't run enough of them, if any, for a figure worth quoting. Seagate's datasheet puts it at 28 dB idle and 32 dB seeking. Power draw is 6.9 W idle on Seagate's figures, or 60 kWh a year if it spends the whole year idling. Put four in RAID 5 and you'll have 90 TB to fill (Windows will call it 81.9 TB).
Specifications
Each value links to the Seagate page or datasheet it came from.