SanDisk vs Western Digital Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 301 products.

As of October 2026, SanDisk averages $0.1301/GB across 9 products while Western Digital averages $0.0846/GB across 292 products on BuyPerUnit. Western Digital offers 35% better value per gigabyte for hard drives (hdd).

SanDisk

Avg $/GB$0.1301

Best $/GB$0.0694

Price Range$0.0694 – $0.2340

Products9

Cheapest Product

SanDisk Professional 18TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive

18TB · $1249.99 · newegg

Western Digital

Better Value

Avg $/GB$0.0846

Best $/GB$0.0375

Price Range$0.0375 – $1.1071

Products292

Cheapest Product

WD Elements 16TB USB 3.0 Desktop External Hard Drive WDBWLG0160HBK-NESN Black

16TB · $599.99 · newegg

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	SanDisk	SanDisk Professional 18TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	18TB	$0.0694	$1249.99	newegg
1	Western Digital	WD Elements 16TB USB 3.0 Desktop External Hard Drive WDBWLG0160HBK-NESN Black	16TB	$0.0375	$599.99	newegg
2	SanDisk	SanDisk Professional G-DRIVE SDPHF1A-008T-NBAAD 8 TB Desktop External Hard Drive - USB 3.2 (Gen 2) Type C - 7200rpm	8TB	$0.0700	$559.99	newegg
2	Western Digital	Western Digital 8TB WD Blue PC Internal Hard Drive HDD - 5640 RPM, SATA 6 Gb/s, 256 MB Cache, 3.5" - WD80EAAZ	8 TB	$0.0387	$309.89	amazon
3	SanDisk	SanDisk Professional 5TB G-Drive ArmorATD - Rugged, Durable Portable External Hard Drive HDD, USB-C, USB 3.2 Gen 1 - SDPH81G-005T-GBA	5 TB	$0.0710	$354.99	amazon
3	Western Digital	WD Blue 8TB Desktop Hard Disk Drive - 5640 RPM SATA 6Gb/s 256MB Cache 3.5 Inch - WD80EAAZ	8TB	$0.0387	$309.99	newegg
4	SanDisk	SanDisk Professional 6TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	6TB	$0.1075	$644.99	newegg
4	Western Digital	WD Elements 20TB USB 3.0 Desktop External Hard Drive WDBWLG0200HBK-NESN Black	20TB	$0.0395	$790.00	newegg
5	SanDisk	SANDISK - 1TB External Portable SSD - Black	1 TB	$0.1290	$128.99	bestbuy
5	Western Digital	WD 16TB Elements Desktop External Hard Drive, USB 3.0 for plug-and-play storage - WDBWLG0160HBK-NESN	16 TB	$0.0405	$647.99	amazon

Which Should You Buy?

Based on current pricing data, Western Digital offers better overall value for hard drives (hdd) at an average of $0.0846/GB compared to SanDisk's $0.1301/GB — that's roughly 35% less per gigabyte.

Western Digital's best deal is the WD Elements 16TB USB 3.0 Desktop External Hard Drive WDBWLG0160HBK-NESN Black (16TB) at $0.0375/GB, while SanDisk's cheapest option is the SanDisk Professional 18TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive (18TB) at $0.0694/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 Western Digital cheaper per GB for hard drives (hdd)?

As of October 2026, Western Digital averages $0.0846/GB compared to SanDisk at $0.1301/GB. Western Digital is approximately 35% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 9 SanDisk products and 292 Western Digital 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 18TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive at $0.0694/GB ($1249.99 for 18TB).

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

The cheapest Western Digital option is the WD Elements 16TB USB 3.0 Desktop External Hard Drive WDBWLG0160HBK-NESN Black at $0.0375/GB ($599.99 for 16TB).

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