4ch vs Unirex SD Cards
Side-by-side price per gigabyte comparison across 7 products.
As of March 2026, 4ch averages $0.1336/GB across 1 products while Unirex averages $0.4149/GB across 6 products on BuyPerUnit. 4ch offers 68% better value per gigabyte for sd cards.
4ch
Better ValueCheapest Product
4CH MDVR Loop Recording Support 512GB For Single SD Card Mobile DVR For Bus Truck512GB · $68.42 · newegg
Unirex
Top Products Compared
| Rank | Brand | Product | Capacity | $/GB | Price | Retailer |
|---|---|---|---|---|---|---|
| 1 | 4ch | 4CH MDVR Loop Recording Support 512GB For Single SD Card Mobile DVR For Bus Truck | 512GB | $0.1336 | $68.42 | newegg |
| 1 | Unirex | Unirex UMS645MUHS1 64GB microSDHC Card | 64GB | $0.1873 | $11.99 | newegg |
| 2 | Unirex | Unirex Full Size SD Card 64GB | 64GB | $0.3123 | $19.99 | newegg |
| 3 | Unirex | Unirex MSU325 32GB MicroSD Card | 32GB | $0.3434 | $10.99 | newegg |
| 4 | Unirex | Unirex MSW325M 4-in-1 Usb/Micro USB Reader and SD Adapter (32GB) | 32GB | $0.3975 | $12.72 | newegg |
| 5 | Unirex | Unirex 16Gb Microsd Card With Sd Adapter, Msu165 | 16GB | $0.6244 | $9.99 | newegg |
Which Should You Buy?
Based on current pricing data, 4ch offers better overall value for sd cards at an average of $0.1336/GB compared to Unirex's $0.4149/GB — that's roughly 68% less per gigabyte.
4ch's best deal is the 4CH MDVR Loop Recording Support 512GB For Single SD Card Mobile DVR For Bus Truck (512GB) at $0.1336/GB, while Unirex's cheapest option is the Unirex UMS645MUHS1 64GB microSDHC Card (64GB) at $0.1873/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 4ch or Unirex cheaper per GB for sd cards?
As of March 2026, 4ch averages $0.1336/GB compared to Unirex at $0.4149/GB. 4ch is approximately 68% cheaper per gigabyte on average.
How many 4ch and Unirex sd cards does BuyPerUnit track?
BuyPerUnit currently tracks 1 4ch products and 6 Unirex products in the sd cards category, all ranked by price per gigabyte.
What is the cheapest 4ch sd card per GB?
The cheapest 4ch option is the 4CH MDVR Loop Recording Support 512GB For Single SD Card Mobile DVR For Bus Truck at $0.1336/GB ($68.42 for 512GB).
What is the cheapest Unirex sd card per GB?
The cheapest Unirex option is the Unirex UMS645MUHS1 64GB microSDHC Card at $0.1873/GB ($11.99 for 64GB).