Seagate vs Western Digital Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 521 products.

As of June 2026, Seagate averages $0.1667/GB across 264 products while Western Digital averages $0.0862/GB across 257 products on BuyPerUnit. Western Digital offers 48% better value per gigabyte for hard drives (hdd).

Seagate

Avg $/GB$0.1667

Best $/GB$0.0244

Price Range$0.0244 – $4.1250

Products264

Cheapest Product

seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002)

8TB · $195.00 · newegg

Western Digital

Better Value

Avg $/GB$0.0862

Best $/GB$0.0168

Price Range$0.0168 – $1.3500

Products257

Cheapest Product

WD Elements 16TB USB 3.0 Desktop External Hard Drive Black

16TB · $268.94 · newegg

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	Seagate	seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002)	8TB	$0.0244	$195.00	newegg
1	Western Digital	WD Elements 16TB USB 3.0 Desktop External Hard Drive Black	16TB	$0.0168	$268.94	newegg
2	Seagate	Seagate Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400)	22 TB	$0.0286	$629.99	amazon
2	Western Digital	WD Elements 10TB USB 3.0 Desktop Hard Drive Black	10TB	$0.0210	$209.51	newegg
3	Seagate	Seagate Barracuda 24TB Internal Hard Drive, 7200 U/Min, 512MB Cache, SATA 6Gb/s, 3.5" (ST24000DM001)	24 TB	$0.0292	$699.95	amazon
3	Western Digital	WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE	2TB	$0.0265	$52.95	newegg
4	Seagate	Seagate BarraCuda Internal Hard Drive 8TB SATA 6Gb/s 256MB Cache 3.5-Inch (ST8000DM004),Mechanical Hard Disk	8 TB	$0.0294	$234.99	amazon
4	Western Digital	WD Elements 20TB USB 3.0 Desktop External Hard Drive WDBWLG0200HBK-NESN Black	20TB	$0.0300	$599.99	newegg
5	Seagate	Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400)	8 TB	$0.0302	$241.80	amazon
5	Western Digital	WD - easystore 20TB External USB 3.0 Hard Drive - Black	20 TB	$0.0328	$654.99	bestbuy

Which Should You Buy?

Based on current pricing data, Western Digital offers better overall value for hard drives (hdd) at an average of $0.0862/GB compared to Seagate's $0.1667/GB — that's roughly 48% less per gigabyte.

Western Digital's best deal is the WD Elements 16TB USB 3.0 Desktop External Hard Drive Black (16TB) at $0.0168/GB, while Seagate's cheapest option is the seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002) (8TB) at $0.0244/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 June 2026, Western Digital averages $0.0862/GB compared to Seagate at $0.1667/GB. Western Digital is approximately 48% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 264 Seagate products and 257 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 archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002) at $0.0244/GB ($195.00 for 8TB).

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

The cheapest Western Digital option is the WD Elements 16TB USB 3.0 Desktop External Hard Drive Black at $0.0168/GB ($268.94 for 16TB).

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