SanDisk vs Seagate Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 272 products.

As of June 2026, SanDisk averages $0.1432/GB across 8 products while Seagate averages $0.1667/GB across 264 products on BuyPerUnit. SanDisk offers 14% better value per gigabyte for hard drives (hdd).

SanDisk

Better Value

Avg $/GB$0.1432

Best $/GB$0.0459

Price Range$0.0459 – $0.2408

Products8

Cheapest Product

SanDisk Professional 22TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive

22TB · $1009.99 · 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	SanDisk	SanDisk Professional 22TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	22TB	$0.0459	$1009.99	newegg
1	Seagate	seagate archive hdd 8tb sata 6gbps 128mb cache sata hard drive (st8000as0002)	8TB	$0.0244	$195.00	newegg
2	SanDisk	SanDisk Professional 18TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	18TB	$0.0574	$1033.99	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	SanDisk	SanDisk Professional 12TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	12TB	$0.0652	$782.99	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	SanDisk	SanDisk Professional 8TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	8TB	$0.0975	$779.99	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	SanDisk	SanDisk 1TB G-DRIVE ArmorATD 2.5' External USB 3.2 (Gen 1) Type C 130 MB/s Maximum Read Transfer Rate Portable Hard Drive Space Gray	1TB	$0.1950	$194.99	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, SanDisk offers better overall value for hard drives (hdd) at an average of $0.1432/GB compared to Seagate's $0.1667/GB — that's roughly 14% less per gigabyte.

SanDisk's best deal is the SanDisk Professional 22TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive (22TB) at $0.0459/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 SanDisk or Seagate cheaper per GB for hard drives (hdd)?

As of June 2026, SanDisk averages $0.1432/GB compared to Seagate at $0.1667/GB. SanDisk is approximately 14% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 8 SanDisk products and 264 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 Professional 22TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive at $0.0459/GB ($1009.99 for 22TB).

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).

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