ADATA vs Seagate Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 278 products.

As of June 2026, ADATA averages $0.0873/GB across 14 products while Seagate averages $0.1667/GB across 264 products on BuyPerUnit. ADATA offers 48% better value per gigabyte for hard drives (hdd).

ADATA

Better Value

Avg $/GB$0.0873

Best $/GB$0.0433

Price Range$0.0433 – $0.1650

Products14

Cheapest Product

5TB AData HD710 Pro USB3.1 2.5-inch Portable Hard Drive (Black)

5TB · $216.71 · newegg

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

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	ADATA	5TB AData HD710 Pro USB3.1 2.5-inch Portable Hard Drive (Black)	5TB	$0.0433	$216.71	newegg
1	Seagate	seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002)	8TB	$0.0244	$195.00	newegg
2	ADATA	ADATA 4TB HD650 Portable Hard Drive USB 3.1 Model AHD650-4TU31-CBK Black	4TB	$0.0512	$204.99	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
3	ADATA	adata hd710m pro 2 tb usb 3.1 rugged waterproof/dustproof/shockproof external hard drive, camouflage (ahd710mp-2tu31-ccf)	2TB	$0.0570	$114.04	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
4	ADATA	ADATA 2TB HD710 Pro USB3.1 2.5' Portable Blue Hard Drive Model AHD710P-2TU31-CBL	2TB	$0.0574	$114.79	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
5	ADATA	ADATA 2TB HD710 Pro Portable Hard Drive USB 3.1 Model AHD710P-2TU31-CBK Black	2TB	$0.0575	$115.00	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

Which Should You Buy?

Based on current pricing data, ADATA offers better overall value for hard drives (hdd) at an average of $0.0873/GB compared to Seagate's $0.1667/GB — that's roughly 48% less per gigabyte.

ADATA's best deal is the 5TB AData HD710 Pro USB3.1 2.5-inch Portable Hard Drive (Black) (5TB) at $0.0433/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 ADATA or Seagate cheaper per GB for hard drives (hdd)?

As of June 2026, ADATA averages $0.0873/GB compared to Seagate at $0.1667/GB. ADATA is approximately 48% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 14 ADATA products and 264 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 5TB AData HD710 Pro USB3.1 2.5-inch Portable Hard Drive (Black) at $0.0433/GB ($216.71 for 5TB).

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).

Explore More

All Hard Drives (HDD)ADATA Hard Drives (HDD)Seagate Hard Drives (HDD)

View all Hard Drives (HDD)