Seagate IronWolf 6TB NAS Hard Drive 7200 RPM 128MB Cache SATA 6.0Gb/s 3.5″ HDD $139.99

https://flash.newegg.com/Product/N82E16822179004

• Range of capacities up to 14TB.
• Workload rate of 180TB/year.
• Optimized for NAS with AgileArray, enables dual-plane balancing and RAID optimization in multi-bay environments.
• Actively protect your NAS with IronWolf Health Management.
• Rotational Vibration (RV) sensors.
• Always-on, always-accessible 24×7 performance.
• 1M hours MTBF, 3-year limited warranty.