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Western Digital - WD Ultrastar DC HC550 WUH721818ALE6L4
Western Digital - WD Ultrastar DC HC550 WUH721818ALE6L4
![](https://media.zones.com/images/products/6BCCCAFA-9FD3-4E44-A301-514B3441F01B.jpg)
Hard drive - 18 TB - internal - 3.5" - SATA 6Gb/s - 7200 rpm - buffer: 512 MB
$457.99
Western Digital - WD Red Pro WD181KFGX
Western Digital - WD Red Pro WD181KFGX
![](https://media.zones.com/images/products/42A04823-2B61-44D5-BABE-2ED03D7A47BA.jpg)
Hard drive - 18 TB - internal - 3.5" - SATA 6Gb/s - 7200 rpm - buffer: 512 MB
$439.99
Western Digital - WD Ultrastar DC HC550 WUH721818ALE6L1
Western Digital - WD Ultrastar DC HC550 WUH721818ALE6L1
![](https://media.zones.com/images/products/09CB200F-5503-4DD8-A73A-DFE4A57A90E6.jpg)
Hard drive - encrypted - 18 TB - internal - 3.5" - SATA 6Gb/s - 7200 rpm - buffer: 512 MB - Self-Encrypting Drive (SED), TCG Enterprise
$479.99
Western Digital - WD Ultrastar DC HC550 WUH721818AL5201
Western Digital - WD Ultrastar DC HC550 WUH721818AL5201
![](https://media.zones.com/images/products/E10BA15D-C4F5-4689-8733-270F389146E0.jpg)
Hard drive - encrypted - 18 TB - internal - 3.5" - SAS 12Gb/s - 7200 rpm - buffer: 512 MB - Self-Encrypting Drive (SED), TCG Enterprise
$485.99
Western Digital - WD Ultrastar DC HC550 WUH721818AL5204
Western Digital - WD Ultrastar DC HC550 WUH721818AL5204
![](https://media.zones.com/images/products/B1AD0655-6980-495F-B1F4-91E6EB2D08D4.jpg)
Hard drive - 18 TB - internal - 3.5" - SAS 12Gb/s - 7200 rpm - buffer: 512 MB
$458.99
Western Digital - WD Purple Pro WD181PURP
Western Digital - WD Purple Pro WD181PURP
![](https://media.zones.com/images/products/E8E4866B-48FE-414D-B3AC-375DC7566B06.jpg)
Hard drive - 18 TB - internal - 3.5" - SATA 6Gb/s - 7200 rpm - buffer: 512 MB
$427.99
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