Seagate has introduced the Exos M series, a range of enterprise-grade mechanical hard drives available in 30TB and 32TB capacities. The two models, the 30TB CMR ST30000NM004K and the 32TB SMR ST32000NM003K, each offer a minimum of 3TB per disk and use a standard 3.
They seem to be real hit or miss. I also have 2 6TB barracudas that have 70,000 power on hours (8 yrs) that are still going fine.