Seagate vs Western Digital Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 576 products.

As of September 2026, Seagate averages $0.1119/GB across 282 products while Western Digital averages $0.0757/GB across 294 products on BuyPerUnit. Western Digital offers 32% better value per gigabyte for hard drives (hdd).

Seagate

Avg $/GB$0.1119

Best $/GB$0.0312

Price Range$0.0312 – $3.1289

Products282

Cheapest Product

Seagate - Barracuda 8TB Internal Hard Drive for Desktops

8 TB · $249.99 · bestbuy

Western Digital

Better Value

Avg $/GB$0.0757

Best $/GB$0.0265

Price Range$0.0265 – $1.1071

Products294

Cheapest Product

WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE

2TB · $52.95 · newegg

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	Seagate	Seagate - Barracuda 8TB Internal Hard Drive for Desktops	8 TB	$0.0312	$249.99	bestbuy
1	Western Digital	WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE	2TB	$0.0265	$52.95	newegg
2	Seagate	Seagate BarraCuda NE-ST8000DM004 8TB 5400 RPM 256MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive Bare Drive	8TB	$0.0312	$249.99	newegg
2	Western Digital	WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4)	18TB	$0.0308	$554.91	newegg
3	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	$0.0312	$249.99	amazon
3	Western Digital	WD Ultrastar DC HC550 16TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38462 (WUH721816ALE6L4)	16TB	$0.0329	$526.58	newegg
4	Seagate	Seagate 16TB One Touch Desktop Hard Drive \| USB-C (STNB16000400)	16 TB	$0.0319	$509.99	amazon
4	Western Digital	Western Digital 12TB WD Blue Internal Hard Drive HDD - 7200 RPM, SATA 6 Gb/s, 512 MB Cache, 3.5" - WD120EAGZ	12 TB	$0.0371	$445.00	amazon
5	Seagate	Seagate - Seagate One Touch Desktop HDD 16TB - Space Gray	16 TB	$0.0319	$509.99	bestbuy
5	Western Digital	WD Blue WD120EAGZ 12TB 7200 RPM 512MB Cache SATA 6.0Gb/s 3.5' Internal Hard Drive	12TB	$0.0375	$449.99	newegg

Which Should You Buy?

Based on current pricing data, Western Digital offers better overall value for hard drives (hdd) at an average of $0.0757/GB compared to Seagate's $0.1119/GB — that's roughly 32% less per gigabyte.

Western Digital's best deal is the WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE (2TB) at $0.0265/GB, while Seagate's cheapest option is the Seagate - Barracuda 8TB Internal Hard Drive for Desktops (8 TB) at $0.0312/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 (hdd)?

As of September 2026, Western Digital averages $0.0757/GB compared to Seagate at $0.1119/GB. Western Digital is approximately 32% cheaper per gigabyte on average.

How many Seagate and Western Digital hard drives (hdd) does BuyPerUnit track?

BuyPerUnit currently tracks 282 Seagate products and 294 Western Digital products in the hard drives (hdd) category, all ranked by price per gigabyte.

What is the cheapest Seagate hard drives (hdd) per GB?

The cheapest Seagate option is the Seagate - Barracuda 8TB Internal Hard Drive for Desktops at $0.0312/GB ($249.99 for 8 TB).

What is the cheapest Western Digital hard drives (hdd) per GB?

The cheapest Western Digital option is the WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE at $0.0265/GB ($52.95 for 2TB).

Explore More

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