The Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter costs $0.1265/GB while the SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN costs $0.1395/GB. Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter offers 9% better value per gigabyte as of April 2026. Both products are available on BuyPerUnit with prices from Amazon, Best Buy, and Newegg.
Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter vs SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN — Which Is Better Value?
Specification Comparison
| Spec | Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter | SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN |
|---|---|---|
| Brand | SP Silicon Power | SanDisk |
| Capacity | 128 GB | 128 GB |
| $/GB | $0.1265 | $0.1395 |
| Price | $16.19 | $17.85 |
| Retailer | Amazon | Amazon |
| Category | SD Cards | SD Cards |
| Subcategory | micro-sd | sd |
Price Across Retailers
Which Should You Buy?
Based on current pricing data, the Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter offers better value at $0.1265//GB compared to the SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN at $0.1395//GB — that's roughly 9% less per gigabyte.
The best deal for the Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter is $16.19 at Amazon, while the SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN starts at $17.85 at Amazon.
However, price per gigabyte isn't everything — consider factors like warranty, performance specs, brand reliability, and your specific capacity needs. Check each Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter and SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN product page for detailed specifications and price history.
Frequently Asked Questions
Is Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter or SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN a better deal?
As of April 2026, Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter offers better value at $0.1265//GB compared to SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN at $0.1395//GB. That is approximately 9% better value per gigabyte.
What is the price per GB of Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter?
The Silicon Power 128GB Superior Micro SDXC UHS-I (U3), V30 4K A2, High Speed MicroSD Card with Adapter is currently priced at $0.1265/GB ($16.19 for 128 GB) at Amazon.
Where can I buy SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN for the cheapest price?
The cheapest price for the SANDISK 128GB Ultra SDXC UHS-I Memory Card - Up to 140MB/s, C10, U1, Full HD, SD Card - SDSDUNB-128G-GN6IN is $17.85 at Amazon, which works out to $0.1395/GB.