SanDisk vs Seagate Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 121 products.

As of May 2026, SanDisk averages $0.9995/GB across 56 products while Seagate averages $0.0468/GB across 65 products on BuyPerUnit. Seagate offers 95% better value per gigabyte for hard drives (hdd).

SanDisk

Avg $/GB$0.9995

Best $/GB$0.2030

Price Range$0.2030 – $22.6555

Products56

Cheapest Product

SANDISK - Cruzer Glide 128GB USB 2.0 Flash Drive - Black

128 GB · $25.99 · bestbuy

Seagate

Better Value

Avg $/GB$0.0468

Best $/GB$0.0227

Price Range$0.0227 – $0.2380

Products65

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	SanDisk	SANDISK - Cruzer Glide 128GB USB 2.0 Flash Drive - Black	128 GB	$0.2030	$25.99	bestbuy
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	SanDisk	SANDISK 2TB Extreme Portable SSD (New Model) - up to 2000MB/s Transfer speeds - USB Type-C connectivity, Reliable Durability - Black - SDSSDE70-2T00-G25	2 TB	$0.2300	$459.99	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	SanDisk	SANDISK 4TB Extreme Portable SSD (New Model) - up to 2000MB/s Transfer speeds - USB Type-C connectivity, Reliable Durability - Black - SDSSDE70-4T00-G25	4 TB	$0.2300	$919.99	amazon
3	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
4	SanDisk	SANDISK - Extreme PLUS 1TB microSDXC UHS-I Memory Card	1 TB	$0.2400	$239.99	bestbuy
4	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
5	SanDisk	SanDisk Extreme 512GB Secure Digital Extended Capacity (SDXC) Flash Card Model SDSDXVV-512G-GNCIN	512GB	$0.2402	$122.99	newegg
5	Seagate	Seagate Exos 7E8 8TB 512e SATA 256MB Cache 3.5-Inch Enterprise Hard Drive (ST8000NM0055) (Renewed)	8 TB	$0.0288	$230.00	amazon

Which Should You Buy?

Based on current pricing data, Seagate offers better overall value for hard drives (hdd) at an average of $0.0468/GB compared to SanDisk's $0.9995/GB — that's roughly 95% 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 SanDisk's cheapest option is the SANDISK - Cruzer Glide 128GB USB 2.0 Flash Drive - Black (128 GB) at $0.2030/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 SanDisk or Seagate cheaper per GB for hard drives (hdd)?

As of May 2026, Seagate averages $0.0468/GB compared to SanDisk at $0.9995/GB. Seagate is approximately 95% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 56 SanDisk products and 65 Seagate products in the hard drives (hdd) category, all ranked by price per gigabyte.

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

The cheapest SanDisk option is the SANDISK - Cruzer Glide 128GB USB 2.0 Flash Drive - Black at $0.2030/GB ($25.99 for 128 GB).

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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