SanDisk vs Western Digital Hard Drives (HDD)

Side-by-side price per gigabyte comparison across 286 products.

As of August 2026, SanDisk averages $0.1274/GB across 4 products while Western Digital averages $0.0758/GB across 282 products on BuyPerUnit. Western Digital offers 41% better value per gigabyte for hard drives (hdd).

SanDisk

Avg $/GB$0.1274

Best $/GB$0.0586

Price Range$0.0586 – $0.2280

Products4

Cheapest Product

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

18TB · $1054.99 · newegg

Western Digital

Better Value

Avg $/GB$0.0758

Best $/GB$0.0265

Price Range$0.0265 – $1.5000

Products282

Cheapest Product

WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE

2TB · $52.95 · 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	$0.0586	$1054.99	newegg
1	Western Digital	WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE	2TB	$0.0265	$52.95	newegg
2	SanDisk	SanDisk Professional 18TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	18TB	$0.0681	$1224.99	newegg
2	Western Digital	WD Elements 18TB USB 3.0 Desktop External Hard Drive NE-WDBWLG0180HBK-NESN Black	18TB	$0.0342	$614.99	newegg
3	SanDisk	SanDisk G-DRIVE ArmorATD 2 TB Portable Rugged Hard Drive SDPH81G002TGBA	2TB	$0.1075	$214.99	newegg
3	Western Digital	WD Ultrastar DC HC550 18TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38459 (WUH721818ALE6L4)	18TB	$0.0342	$615.95	newegg
4	SanDisk	SanDisk Professional 6TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive	6TB	$0.1075	$644.99	newegg
4	Western Digital	WD 20TB Elements Desktop External Hard Drive, USB 3.0 drive for plug-and-play storage - WDBWLG0200HBK-NESN	20 TB	$0.0350	$700.35	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	Western Digital	WD Ultrastar DC HC550 16TB Hard Drive 3.5' Internal 512MB SATA 7200 RPM 512E SE NP3 DC HC550 0F38462 (WUH721816ALE6L4)	16TB	$0.0363	$580.06	newegg

Which Should You Buy?

Based on current pricing data, Western Digital offers better overall value for hard drives (hdd) at an average of $0.0758/GB compared to SanDisk's $0.1274/GB — that's roughly 41% less per gigabyte.

Western Digital's best deal is the WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE (2TB) at $0.0265/GB, while SanDisk's cheapest option is the SanDisk Professional 18TB G-DRIVE PROJECT Thunderbolt 3 External Hard Drive (18TB) at $0.0586/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 August 2026, Western Digital averages $0.0758/GB compared to SanDisk at $0.1274/GB. Western Digital is approximately 41% cheaper per gigabyte on average.

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

BuyPerUnit currently tracks 4 SanDisk products and 282 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 $0.0586/GB ($1054.99 for 18TB).

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

The cheapest Western Digital option is the WD2003FYYS-18W0B0 - DELL WD2003FYYS-18W0B0 DELL 2TB 7.2K 3G LFF SATA HARD DRIVE at $0.0265/GB ($52.95 for 2TB).

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