SanDisk vs Unionsine Hard Drives & SSDs

Side-by-side price per gigabyte comparison across 120 products.

As of March 2026, SanDisk averages $1.3777/GB across 118 products while Unionsine averages $0.0665/GB across 2 products on BuyPerUnit. Unionsine offers 95% better value per gigabyte for hard drives & ssds.

SanDisk

Avg $/GB$1.3777

Best $/GB$0.0925

Price Range$0.0925 – $47.8109

Products118

Cheapest Product

SANDISK - 8TB Desk Drive USB Type-C Desktop External SSD - Black

8 TB · $739.99 · bestbuy

Unionsine

Better Value

Avg $/GB$0.0665

Best $/GB$0.0615

Price Range$0.0615 – $0.0715

Products2

Cheapest Product

UnionSine 500GB Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one, Xbox 360-(Black)

500 GB · $30.73 · amazon

Top Products Compared

Rank	Brand	Product	Capacity	$/GB	Price	Retailer
1	SanDisk	SANDISK - 8TB Desk Drive USB Type-C Desktop External SSD - Black	8 TB	$0.0925	$739.99	bestbuy
1	Unionsine	UnionSine 500GB Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one, Xbox 360-(Black)	500 GB	$0.0615	$30.73	amazon
2	SanDisk	SANDISK - Extreme Portable 4TB External USB-C NVMe SSD - Black	4 TB	$0.1125	$449.99	bestbuy
2	Unionsine	UnionSine 500GB Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one, Xbox 360-(Pink)	500 GB	$0.0715	$35.73	amazon
3	SanDisk	SanDisk 4TB Extreme Portable SSD - Up to 1050MB/s, USB-C, USB 3.2 Gen 2, IP65 Water and Dust Resistance, Updated Firmware - External Solid State Drive - SDSSDE61-4T00-G25	4 TB	$0.1125	$449.99	amazon
4	SanDisk	SANDISK - 2TB Creator Phone SSD External USB Type C Drive with Magsafe Compatibility for iPhone 15/16 - Blue	2 TB	$0.1150	$229.99	bestbuy
5	SanDisk	SanDisk 2TB Portable SSD - Up to 800MB/s, USB-C, USB 3.2 Gen 2, Updated Firmware - External Solid State Drive - SDSSDE30-2T00-G26	2 TB	$0.1163	$232.57	amazon

Which Should You Buy?

Based on current pricing data, Unionsine offers better overall value for hard drives & ssds at an average of $0.0665/GB compared to SanDisk's $1.3777/GB — that's roughly 95% less per gigabyte.

Unionsine's best deal is the UnionSine 500GB Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one, Xbox 360-(Black) (500 GB) at $0.0615/GB, while SanDisk's cheapest option is the SANDISK - 8TB Desk Drive USB Type-C Desktop External SSD - Black (8 TB) at $0.0925/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 Unionsine cheaper per GB for hard drives & ssds?

As of March 2026, Unionsine averages $0.0665/GB compared to SanDisk at $1.3777/GB. Unionsine is approximately 95% cheaper per gigabyte on average.

How many SanDisk and Unionsine hard drives & ssds does BuyPerUnit track?

BuyPerUnit currently tracks 118 SanDisk products and 2 Unionsine products in the hard drives & ssds category, all ranked by price per gigabyte.

What is the cheapest SanDisk hard drives & ssd per GB?

The cheapest SanDisk option is the SANDISK - 8TB Desk Drive USB Type-C Desktop External SSD - Black at $0.0925/GB ($739.99 for 8 TB).

What is the cheapest Unionsine hard drives & ssd per GB?

The cheapest Unionsine option is the UnionSine 500GB Ultra Slim Portable External Hard Drive HDD-USB 3.0 for PC, Mac, Laptop, PS4, Xbox one, Xbox 360-(Black) at $0.0615/GB ($30.73 for 500 GB).

Explore More

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