Seagate vs Western Digital Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 145 products.

As of May 2026, Seagate averages $0.0471/GB across 66 products while Western Digital averages $0.0658/GB across 79 products on BuyPerUnit. Seagate offers 28% better value per gigabyte for hard drives (hdd).

Seagate

Better Value

Avg $/GB$0.0471

Best $/GB$0.0227

Price Range$0.0227 – $0.2380

Products66

Cheapest Product

Seagate Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400)

22 TB · $499.99 · amazon

Western Digital

Avg $/GB$0.0658

Best $/GB$0.0267

Price Range$0.0267 – $1.2000

Products79

Cheapest Product

WD - D10 Game Drive for Xbox 12TB External USB 3.2 Gen 1 Portable Hard Drive - Black

12 TB · $319.99 · bestbuy

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	Seagate	Seagate Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400)	22 TB	$0.0227	$499.99	amazon
1	Western Digital	WD - D10 Game Drive for Xbox 12TB External USB 3.2 Gen 1 Portable Hard Drive - Black	12 TB	$0.0267	$319.99	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	$0.0280	$559.99	bestbuy
3	Seagate	Seagate - Expansion 16TB External USB 3.0 Desktop Hard Drive with Rescue Data Recovery Services - Black	16 TB	$0.0262	$419.99	bestbuy
3	Western Digital	WD - easystore 18TB External USB 3.0 Hard Drive - Black	18 TB	$0.0283	$509.99	bestbuy
4	Seagate	Seagate Exos 7E8 Enterprise Capacity 3.5 HDD 8TB 7200 RPM SATA 6Gb/s 4Kn 256MB Cache 3.5-Inch Enterprise Hard Disk Drive ST8000NM0045 (Renewed)	8 TB	$0.0269	$215.00	amazon
4	Western Digital	Western Digital 14TB Elements Desktop External Hard Drive - USB 3.0	14 TB	$0.0284	$396.99	amazon
5	Seagate	Seagate 8TB Terascale Enterprise HDD 7200RPM 256MB Cache SATA 6Gb/s 64MB Cache 3.5-Inch Internal Hard Drive (ST8000NC0002) (Renewed)	8 TB	$0.0274	$219.50	amazon
5	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	$0.0287	$344.15	amazon

Which Should You Buy?

Based on current pricing data, Seagate offers better overall value for hard drives (hdd) at an average of $0.0471/GB compared to Western Digital's $0.0658/GB — that's roughly 28% less per gigabyte.

Seagate's best deal is the Seagate Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400) (22 TB) at $0.0227/GB, while Western Digital's cheapest option is the WD - D10 Game Drive for Xbox 12TB External USB 3.2 Gen 1 Portable Hard Drive - Black (12 TB) at $0.0267/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 May 2026, Seagate averages $0.0471/GB compared to Western Digital at $0.0658/GB. Seagate is approximately 28% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 66 Seagate products and 79 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 Expansion 22TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP22000400) at $0.0227/GB ($499.99 for 22 TB).

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

The cheapest Western Digital option is the WD - D10 Game Drive for Xbox 12TB External USB 3.2 Gen 1 Portable Hard Drive - Black at $0.0267/GB ($319.99 for 12 TB).

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