Sp Silicon Power vs Western Digital Hard Drives & SSDs

Side-by-side price per gigabyte comparison across 107 products.

As of March 2026, Sp Silicon Power averages $0.1528/GB across 10 products while Western Digital averages $0.1178/GB across 97 products on BuyPerUnit. Western Digital offers 23% better value per gigabyte for hard drives & ssds.

Sp Silicon Power

Avg $/GB$0.1528

Best $/GB$0.0900

Price Range$0.0900 – $0.2304

Products10

Cheapest Product

SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25)

4 TB · $359.97 · amazon

Western Digital

Better Value

Avg $/GB$0.1178

Best $/GB$0.0217

Price Range$0.0217 – $1.1990

Products97

Cheapest Product

WD - easystore 18TB External USB 3.0 Hard Drive - Black

18 TB · $389.99 · bestbuy

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	Sp Silicon Power	SP Silicon Power 4TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5'' 7mm (0.28'') Internal Solid State Drive (SP004TBSS3A55S25)	4 TB	$0.0900	$359.97	amazon
1	Western Digital	WD - easystore 18TB External USB 3.0 Hard Drive - Black	18 TB	$0.0217	$389.99	bestbuy
2	Sp Silicon Power	Silicon Power 2TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") SSD Internal Solid State Drive (SU002TBSS3A55S25EC)	2 TB	$0.1100	$219.97	amazon
2	Western Digital	WD - easystore 20TB External USB 3.0 Hard Drive - Black	20 TB	$0.0220	$439.99	bestbuy
3	Sp Silicon Power	Silicon Power 2TB NVMe M.2 PCIe Gen3x4 2280 SSD Solid State Drive (SP002TBP34A60M28)	2 TB	$0.1350	$269.97	amazon
3	Western Digital	WD 16TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Backup Software - WDBBGB0160HBK-NESN	16 TB	$0.0225	$360.49	amazon
4	Sp Silicon Power	Silicon Power 1TB A55 M.2 SATA M+B Key SSD Internal Solid State Drive 2280 SU001TBSS3A55M28AB	1 TB	$0.1400	$139.97	amazon
4	Western Digital	WD 18TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Auto Backup Software - WDBBGB0180HBK-NESN	18 TB	$0.0233	$419.99	amazon
5	Sp Silicon Power	SP 1TB SSD 3D NAND A55 SLC Cache Performance Boost SATA III 2.5" 7mm (0.28") Internal Solid State Drive (SP001TBSS3A55S25)	1 TB	$0.1440	$143.97	amazon
5	Western Digital	Western Digital 10TB WD Blue Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD100EAGZ	10 TB	$0.0240	$239.99	amazon

Which Should You Buy?

Based on current pricing data, Western Digital offers better overall value for hard drives & ssds at an average of $0.1178/GB compared to Sp Silicon Power's $0.1528/GB — that's roughly 23% less per gigabyte.

Western Digital's best deal is the WD - easystore 18TB External USB 3.0 Hard Drive - Black (18 TB) at $0.0217/GB, while Sp Silicon Power's cheapest option is 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) (4 TB) at $0.0900/GB.

However, price per GB isn't everything — consider factors like warranty, performance specs, and your specific capacity needs. Check individual product pages for detailed specifications.

Frequently Asked Questions

Is Sp Silicon Power or Western Digital cheaper per GB for hard drives & ssds?

As of March 2026, Western Digital averages $0.1178/GB compared to Sp Silicon Power at $0.1528/GB. Western Digital is approximately 23% cheaper per gigabyte on average.

How many Sp Silicon Power and Western Digital hard drives & ssds does BuyPerUnit track?

BuyPerUnit currently tracks 10 Sp Silicon Power products and 97 Western Digital products in the hard drives & ssds category, all ranked by price per gigabyte.

What is the cheapest Sp Silicon Power hard drives & ssd per GB?

The cheapest Sp Silicon Power option is 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) at $0.0900/GB ($359.97 for 4 TB).

What is the cheapest Western Digital hard drives & ssd per GB?

The cheapest Western Digital option is the WD - easystore 18TB External USB 3.0 Hard Drive - Black at $0.0217/GB ($389.99 for 18 TB).

Explore More

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