Seagate vs Western Digital Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 464 products.

As of June 2026, Seagate averages $0.1353/GB across 251 products while Western Digital averages $0.0820/GB across 213 products on BuyPerUnit. Western Digital offers 39% better value per gigabyte for hard drives (hdd).

Seagate

Avg $/GB$0.1353

Best $/GB$0.0222

Price Range$0.0222 – $3.1289

Products251

Cheapest Product

Seagate One Touch 18TB USB 3.0 / USB Type-C Hard Drives - Desktop External Black

18TB · $399.00 · newegg

Western Digital

Better Value

Avg $/GB$0.0820

Best $/GB$0.0168

Price Range$0.0168 – $1.3500

Products213

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 One Touch 18TB USB 3.0 / USB Type-C Hard Drives - Desktop External Black	18TB	$0.0222	$399.00	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	$0.0241	$529.99	amazon
2	Western Digital	WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE	2TB	$0.0265	$52.95	newegg
3	Seagate	seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002)	8TB	$0.0244	$195.00	newegg
3	Western Digital	WD - easystore 18TB External USB 3.0 Hard Drive - Black	18 TB	$0.0283	$509.99	bestbuy
4	Seagate	Seagate Expansion 6TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP6000400)	6 TB	$0.0266	$159.35	amazon
4	Western Digital	Western Digital 12TB WD Red Plus NAS Internal Hard Drive HDD - 7200 RPM, SATA 6 GB/s, CMR, 512 MB Cache, 3.5" - WD120EFGX	12 TB	$0.0298	$357.99	amazon
5	Seagate	Seagate Barracuda 24TB Internal Hard Drive, 7200 U/Min, 512MB Cache, SATA 6Gb/s, 3.5" (ST24000DM001)	24 TB	$0.0271	$649.95	amazon
5	Western Digital	WD 12TB My Book Desktop External Hard Drive, USB 3.0, External HDD with Password Protection and Auto Backup Software - WDBBGB0120HBK-NESN	12 TB	$0.0305	$366.10	amazon

Which Should You Buy?

Based on current pricing data, Western Digital offers better overall value for hard drives (hdd) at an average of $0.0820/GB compared to Seagate's $0.1353/GB — that's roughly 39% 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 One Touch 18TB USB 3.0 / USB Type-C Hard Drives - Desktop External Black (18TB) at $0.0222/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 $0.0820/GB compared to Seagate at $0.1353/GB. Western Digital is approximately 39% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 251 Seagate products and 213 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 One Touch 18TB USB 3.0 / USB Type-C Hard Drives - Desktop External Black at $0.0222/GB ($399.00 for 18TB).

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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