Seagate vs Silicon Power Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 257 products.

As of June 2026, Seagate averages $0.1353/GB across 251 products while Silicon Power averages $0.0889/GB across 6 products on BuyPerUnit. Silicon Power offers 34% 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

Silicon Power

Better Value

Avg $/GB$0.0889

Best $/GB$0.0592

Price Range$0.0592 – $0.1340

Products6

Cheapest Product

4TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.2 - All-Black Edition

4TB · $236.99 · 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	Silicon Power	4TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.2 - All-Black Edition	4TB	$0.0592	$236.99	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	Silicon Power	5TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.0 - Black/Green Edition	5TB	$0.0610	$304.99	newegg
3	Seagate	seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002)	8TB	$0.0244	$195.00	newegg
3	Silicon Power	Silicon Power 2TB Armor A60 Shockproof and Water-Resistant Portable Hard Drive USB 3.0 Model SP020TBPHDA60S3K Black	2TB	$0.0875	$174.99	newegg
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	Silicon Power	2TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.2 - All-Black Edition	2TB	$0.0880	$175.99	newegg
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	Silicon Power	Silicon Power 2TB Armor A80 Portable Hard Drive USB 3.0 Model SP020TBPHDA80S3B Blue	2TB	$0.1035	$206.99	newegg

Which Should You Buy?

Based on current pricing data, Silicon Power offers better overall value for hard drives (hdd) at an average of $0.0889/GB compared to Seagate's $0.1353/GB — that's roughly 34% less per gigabyte.

Silicon Power's best deal is the 4TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.2 - All-Black Edition (4TB) at $0.0592/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 Silicon Power cheaper per GB for hard drives (hdd)?

As of June 2026, Silicon Power averages $0.0889/GB compared to Seagate at $0.1353/GB. Silicon Power is approximately 34% cheaper per gigabyte on average.

How many Seagate and Silicon Power hard drives (hdd) does BuyPerUnit track?

BuyPerUnit currently tracks 251 Seagate products and 6 Silicon Power 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 Silicon Power hard drives (hdd) per GB?

The cheapest Silicon Power option is the 4TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.2 - All-Black Edition at $0.0592/GB ($236.99 for 4TB).

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