![Amazon.com: Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD181KFGX : Electronics Amazon.com: Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD181KFGX : Electronics](https://m.media-amazon.com/images/I/41APjSRQGJL._AC_SY580_.jpg)
Amazon.com: Western Digital 18TB WD Red Pro NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, CMR, 256 MB Cache, 3.5" - WD181KFGX : Electronics
![Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J) - Newegg.com Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J) - Newegg.com](https://c1.neweggimages.com/ProductImage/1B4-00VK-00616-S01.jpg)
Seagate 18TB Exos X18 7200 RPM SATA 6Gb/s 256MB Cache 3.5-Inch Enterprise Hard Drive HDD (ST18000NM000J) - Newegg.com
![Amazon.com: Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ : Electronics Amazon.com: Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ : Electronics](https://m.media-amazon.com/images/I/71vu7FPD-hL.jpg)
Amazon.com: Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ : Electronics
![Seagate IronWolf Pro 18TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST18000NE000 - Newegg.com Seagate IronWolf Pro 18TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST18000NE000 - Newegg.com](https://c1.neweggimages.com/ProductImageCompressAll1280/22-184-872-V01.jpg)
Seagate IronWolf Pro 18TB NAS Hard Drive 7200 RPM 256MB Cache CMR SATA 6.0Gb/s 3.5" Internal HDD ST18000NE000 - Newegg.com
![Amazon.com: Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ : Electronics Amazon.com: Western Digital 18TB WD Gold Enterprise Class Internal Hard Drive - 7200 RPM Class, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD181KRYZ : Electronics](https://m.media-amazon.com/images/I/31SW7iQzSvL._AC_.jpg)