ADATA vs Silicon Power Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 18 products.

As of June 2026, ADATA averages $0.0821/GB across 12 products while Silicon Power averages $0.0889/GB across 6 products on BuyPerUnit. ADATA offers 8% better value per gigabyte for hard drives (hdd).

ADATA

Better Value

Avg $/GB$0.0821

Best $/GB$0.0412

Price Range$0.0412 – $0.1650

Products12

Cheapest Product

ADATA 4TB HD650 Portable Hard Drive USB 3.1 Model AHD650-4TU31-CBK Black

4TB · $164.66 · newegg

Silicon Power

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	ADATA	ADATA 4TB HD650 Portable Hard Drive USB 3.1 Model AHD650-4TU31-CBK Black	4TB	$0.0412	$164.66	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	ADATA	5TB AData HD710 Pro USB3.1 2.5-inch Portable Hard Drive (Black)	5TB	$0.0437	$218.51	newegg
2	Silicon Power	5TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.0 - Black/Green Edition	5TB	$0.0610	$304.99	newegg
3	ADATA	ADATA HD710 Pro - 2 TB External Hard Drive - Shockproof, Waterproof & Dustproof - Durable Storage - For Gamers, Students & Professionals - Mac, PC & Linux Compatible - Blue - AHD710P-2TU31-CBL	2 TB	$0.0475	$94.99	amazon
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	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	$0.0475	$94.99	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	ADATA	adata hd710m pro 2 tb usb 3.1 rugged waterproof/dustproof/shockproof external hard drive, camouflage (ahd710mp-2tu31-ccf)	2TB	$0.0575	$115.03	newegg
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, ADATA offers better overall value for hard drives (hdd) at an average of $0.0821/GB compared to Silicon Power's $0.0889/GB — that's roughly 8% less per gigabyte.

ADATA's best deal is the ADATA 4TB HD650 Portable Hard Drive USB 3.1 Model AHD650-4TU31-CBK Black (4TB) at $0.0412/GB, while Silicon Power's cheapest option is the 4TB Silicon Power Armor A60 Shockproof Portable Hard Drive - USB3.2 - All-Black Edition (4TB) at $0.0592/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 Silicon Power cheaper per GB for hard drives (hdd)?

As of June 2026, ADATA averages $0.0821/GB compared to Silicon Power at $0.0889/GB. ADATA is approximately 8% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 12 ADATA products and 6 Silicon Power 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 4TB HD650 Portable Hard Drive USB 3.1 Model AHD650-4TU31-CBK Black at $0.0412/GB ($164.66 for 4TB).

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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