The WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) costs $0.0342/GB while the Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) costs $0.0546/GB. WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4) offers 37% 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 Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) — 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) | Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) |
|---|---|---|
| Brand | Western Digital | Apricorn |
| Capacity | 18TB | 18TB |
| $/GB | $0.0342 | $0.0546 |
| Price | $615.95 | $982.99 |
| 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)
Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB)
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 $0.0342//GB compared to the Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) at $0.0546//GB — that's roughly 37% 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 $615.95 at Newegg, while the Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) starts at $982.99 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 Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) 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 Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) 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 $0.0342//GB compared to Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) at $0.0546//GB. That is approximately 37% 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 $0.0342/GB ($615.95 for 18TB) at Newegg.
Where can I buy Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) for the cheapest price?
The cheapest price for the Apricorn Aegis Padlock DT 18 TB Desktop Hard Drive - External - TAA Compliant - USB 3.0 - 256-bit AES Encryption Standard (ADT-3PL256-18TB) is $982.99 at Newegg, which works out to $0.0546/GB.