This was purchased from B&H, and it is brand new sealed.
The Seagate 6TB IronWolf 7200 rpm SATA III 3.5" Internal NAS HDD is built to withstand 24x7 operations for 1-to-8 bay NAS applications. Durability-wise, it has a workload rate of 180TB a year with 8760 power-on hours, 600,000 load/unload cycles, a 1 million hour MTBF rating, and 1 in 1015 non-recoverable read errors per bits read. As a standard 3.5" drive, it's compatible with most NAS systems and computers. Utilizing the SATA III 6 Gb/s interface and operating at 7200 rpm, this drive offers users a max sustained transfer rate of 210 MB/s.