The Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray costs $0.0350/GB while the WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP costs $0.0469/GB. Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray offers 25% better value per gigabyte as of August 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray vs WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP — Which Is Better Value?
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Specification Comparison
| Spec | Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray | WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP |
|---|---|---|
| Brand | Seagate | Western Digital |
| Capacity | 16 TB | 18TB |
| $/GB | $0.0350 | $0.0469 |
| Price | $559.99 | $844.99 |
| Retailer | Best Buy | Newegg |
| Category | Hard Drives (HDD) | Hard Drives (HDD) |
| Subcategory | hdd | hdd |
Price Across Retailers
Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray
Which Should You Buy?
Based on current pricing data, the Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray offers better value at $0.0350//GB compared to the WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP at $0.0469//GB — that's roughly 25% less per gigabyte.
The best deal for the Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray is $559.99 at Best Buy, while the WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP starts at $844.99 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray and WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP product page for detailed specifications and price history.
Frequently Asked Questions
Is Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray or WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP a better deal?
As of August 2026, Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray offers better value at $0.0350//GB compared to WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP at $0.0469//GB. That is approximately 25% better value per gigabyte.
What is the price per GB of Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray?
The Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray is currently priced at $0.0350/GB ($559.99 for 16 TB) at Best Buy.
Where can I buy WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP for the cheapest price?
The cheapest price for the WD Purple Pro 18TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive - WD181PURP is $844.99 at Newegg, which works out to $0.0469/GB.