Seagate vs Western Digital Hard Drives & SSDs

Side-by-side price per gigabyte comparison across 141 products.

As of March 2026, Seagate averages $0.0641/GB across 43 products while Western Digital averages $0.1167/GB across 98 products on BuyPerUnit. Seagate offers 45% better value per gigabyte for hard drives & ssds.

Seagate

Better Value

Avg $/GB$0.0641

Best $/GB$0.0244

Price Range$0.0244 – $0.2400

Products43

Cheapest Product

Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400)

8 TB · $195.35 · amazon

Western Digital

Avg $/GB$0.1167

Best $/GB$0.0217

Price Range$0.0217 – $1.1990

Products98

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	Seagate	Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400)	8 TB	$0.0244	$195.35	amazon
1	Western Digital	WD - easystore 18TB External USB 3.0 Hard Drive - Black	18 TB	$0.0217	$389.99	bestbuy
2	Seagate	Seagate - Game Drive for Xbox 8TB External USB 3.2 Gen 1 Desktop Hard Drive with Certified Xbox Green LED Lighting - Black	8 TB	$0.0250	$199.99	bestbuy
2	Western Digital	WD - easystore 20TB External USB 3.0 Hard Drive - Black	20 TB	$0.0220	$439.99	bestbuy
3	Seagate	Seagate - Barracuda 8TB Internal Hard Drive for Desktops	8 TB	$0.0250	$199.99	bestbuy
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	Seagate	Seagate - IronWolf Pro 16TB NAS Internal Hard Drive with Rescue Data Recovery Services	16 TB	$0.0250	$399.99	bestbuy
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	Seagate	Seagate BarraCuda 8 TB Internal Hard Drive HDD – 3.5 Inch SATA 6 Gb/s, 5,400 RPM, 256 MB Cache for Computer Desktop PC (ST8000DMZ04/004)	8 TB	$0.0250	$199.99	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, Seagate offers better overall value for hard drives & ssds at an average of $0.0641/GB compared to Western Digital's $0.1167/GB — that's roughly 45% less per gigabyte.

Seagate's best deal is the Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400) (8 TB) at $0.0244/GB, while Western Digital's cheapest option is the WD - easystore 18TB External USB 3.0 Hard Drive - Black (18 TB) at $0.0217/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 Seagate or Western Digital cheaper per GB for hard drives & ssds?

As of March 2026, Seagate averages $0.0641/GB compared to Western Digital at $0.1167/GB. Seagate is approximately 45% cheaper per gigabyte on average.

How many Seagate and Western Digital hard drives & ssds does BuyPerUnit track?

BuyPerUnit currently tracks 43 Seagate products and 98 Western Digital products in the hard drives & ssds category, all ranked by price per gigabyte.

What is the cheapest Seagate hard drives & ssd per GB?

The cheapest Seagate option is the Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400) at $0.0244/GB ($195.35 for 8 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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