DS1019+ with 5 of them for 6 months so far.

Seagate Exos X18 18TB 7200RPM SATA 6Gb/s 3.5-Inch Enterprise Hard Drive 2-Pack - ST18000NM000J (Renewed) https://www.amazon.com/dp/B09V226G5P/ref=cm_sw_r_apan_i_6Z3CBS125CAPW8KS80Q1?_encoding=UTF8&psc=1