The WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) costs $0.0353/GB while the Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... costs $0.0409/GB. WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) offers 14% better value per gigabyte as of July 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) vs Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... — Which Is Better Value?
Specification Comparison
| Spec | WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) | Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... |
|---|---|---|
| Brand | Western Digital | Seagate |
| Capacity | 18TB | 16TB |
| $/GB | $0.0353 | $0.0409 |
| Price | $635.07 | $655.00 |
| Retailer | Newegg | Newegg |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4)
Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health...
Which Should You Buy?
Based on current pricing data, the WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) offers better value at $0.0353//GB compared to the Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... at $0.0409//GB — that's roughly 14% less per gigabyte.
The best deal for the WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) is $635.07 at Newegg, while the Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... starts at $655.00 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) and Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... product page for detailed specifications and price history.
Frequently Asked Questions
Is WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) or Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... a better deal?
As of July 2026, WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) offers better value at $0.0353//GB compared to Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... at $0.0409//GB. That is approximately 14% better value per gigabyte.
What is the price per GB of WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4)?
The WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) is currently priced at $0.0353/GB ($635.07 for 18TB) at Newegg.
Where can I buy Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... for the cheapest price?
The cheapest price for the Seagate Skyhawk AI 16TB Video Internal Hard Drive HDD - 3.5 Inch SATA 6Gb/s 256MB Cache for DVR NVR Security Camera System with Drive Health... is $655.00 at Newegg, which works out to $0.0409/GB.