ADATA vs Seagate Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 69 products.

As of May 2026, ADATA averages $0.0993/GB across 3 products while Seagate averages $0.0471/GB across 66 products on BuyPerUnit. Seagate offers 53% better value per gigabyte for hard drives (hdd).

ADATA

Avg $/GB$0.0993

Best $/GB$0.0360

Price Range$0.0360 – $0.1881

Products3

Cheapest Product

ADATA HD710 Pro 5TB External Hard Drive (AHD710P-5TU31-CBK)

5 TB · $179.99 · amazon

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

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	ADATA	ADATA HD710 Pro 5TB External Hard Drive (AHD710P-5TU31-CBK)	5 TB	$0.0360	$179.99	amazon
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
2	ADATA	ADATA HD710 Pro - 2 TB External Hard Drive - Shockproof, Waterproof & Dustproof - Durable Storage - For Gamers, Students & Professionals - Mac, PC & Linux Compatible - Black - AHD710P-2TU31-CBK	2 TB	$0.0737	$147.39	amazon
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
3	ADATA	ADATA SC735 External SSD - 2TB USB 3.2 Gen2 Portable Solid State Drive for Gaming & High Speed Data Transfer - Up to 1050/1000MB/s - MIL-STD Drop Resistant - Black/Grey - 1 Count	2 TB	$0.1881	$376.12	amazon
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
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
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

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 ADATA's $0.0993/GB — that's roughly 53% 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 ADATA's cheapest option is the ADATA HD710 Pro 5TB External Hard Drive (AHD710P-5TU31-CBK) (5 TB) at $0.0360/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 ADATA or Seagate cheaper per GB for hard drives (hdd)?

As of May 2026, Seagate averages $0.0471/GB compared to ADATA at $0.0993/GB. Seagate is approximately 53% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 3 ADATA products and 66 Seagate products in the hard drives (hdd) category, all ranked by price per gigabyte.

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

The cheapest ADATA option is the ADATA HD710 Pro 5TB External Hard Drive (AHD710P-5TU31-CBK) at $0.0360/GB ($179.99 for 5 TB).

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).

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