The Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A costs $0.2114/GB while the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) costs $0.0825/GB. SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) offers 61% better value per gigabyte as of June 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A vs SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) — Which Is Better Value?
Specification Comparison
| Spec | Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A | SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) |
|---|---|---|
| Brand | Western Digital | SP Silicon Power |
| Capacity | 4TB | 4 TB |
| $/GB | $0.2114 | $0.0825 |
| Price | $845.49 | $329.97 |
| Retailer | Newegg | Amazon |
| Category | SSDs & NVMe Drives | SSDs & NVMe Drives |
| Subcategory | ssd | ssd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) offers better value at $0.0825//GB compared to the Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A at $0.2114//GB — that's roughly 61% less per gigabyte.
The best deal for the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) is $329.97 at Amazon, while the Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A starts at $845.49 at Newegg.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A and SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) product page for detailed specifications and price history.
Frequently Asked Questions
Is Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A or SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) a better deal?
As of June 2026, SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) offers better value at $0.0825//GB compared to Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A at $0.2114//GB. That is approximately 61% better value per gigabyte.
What is the price per GB of Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A?
The Western Digital WD Red SA500 2.5' 4TB SATA III 3D NAND Internal Solid State Drive (SSD) WDS400T1R0A is currently priced at $0.2114/GB ($845.49 for 4TB) at Newegg.
Where can I buy SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) for the cheapest price?
The cheapest price for the SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25) is $329.97 at Amazon, which works out to $0.0825/GB.