Seagate vs Unionsine Hard Drives & SSDs
Side-by-side price per gigabyte comparison across 45 products.
As of March 2026, Seagate averages $0.0638/GB across 43 products while Unionsine averages $0.0665/GB across 2 products on BuyPerUnit. Seagate offers 4% better value per gigabyte for hard drives & ssds.
Seagate
Better ValueCheapest Product
Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400)8 TB · $195.31 · amazon
Unionsine
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
Which Should You Buy?
Based on current pricing data, Seagate offers better overall value for hard drives & ssds at an average of $0.0638/GB compared to Unionsine's $0.0665/GB — that's roughly 4% less per gigabyte.
Seagate's best deal is the Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400) (8 TB) at $0.0244/GB, while Unionsine's cheapest 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) (500 GB) at $0.0615/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 Seagate or Unionsine cheaper per GB for hard drives & ssds?
As of March 2026, Seagate averages $0.0638/GB compared to Unionsine at $0.0665/GB. Seagate is approximately 4% cheaper per gigabyte on average.
How many Seagate and Unionsine hard drives & ssds does BuyPerUnit track?
BuyPerUnit currently tracks 43 Seagate products and 2 Unionsine products in the hard drives & ssds category, all ranked by price per gigabyte.
What is the cheapest Seagate hard drives & ssd per GB?
The cheapest Seagate option is the Seagate Expansion 8TB External Hard Drive HDD - USB 3.0, with Rescue Data Recovery Services (STKP8000400) at $0.0244/GB ($195.31 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).