SanDisk Ultra 128GB SDXC
Score: 87/100
Amazon Basics 256GB Micro SDXC
Score: 85/100Rankings
The SanDisk Ultra 128 GB SDXC card offers fast read performance, A1 app capability, and a robust, water- and shock-resistant design, backed by a 10-year warranty. Its U1/V10 rating and modest write speeds keep it in the budget tier, making it unsuitable for 4K or high-bitrate video work.
The Amazon Basics 256 GB microSDXC offers solid 100 MB/s read performance, A2 app class, and a full-size adapter in a rugged, waterproof package, making it a budget-friendly choice for 4K video and mobile storage. Its durability features and broad device compatibility add to its appeal, though write speeds are modest and warranty coverage is limited.
| Attribute | | |
|---|---|---|
128 GB | 256 GBbest | |
100 MB/sbest | 100 MB/sbest | |
63 MB/s | 90 MB/sbest | |
10 yearsbest | — | |
| ↓ lower better | 8 g | 0.9 gbest |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage & Capacity(2) | ||
Capacity (GB) | 128 GB | 256 GB |
Card Type | SDXC | microSDXC |
Performance(4) | ||
UHS Speed Class | U1 | U3 |
Video Speed Class | V10 | V30 |
Maximum Write Speed (MB/s) | 63 MB/s | 90 MB/s |
Application Performance Class | A1 | A2 |
Compatibility(1) | ||
Compatible Devices | Broad device compatibility via SD adapter | Smartphones, tablets, DSLRs, action cameras, drones, laptops, game consoles (except Nintendo Switch 2), car audio systems |
Physical(1) | ||
Weight (g) | 8 g | 0.9 g |
Products in the top-left offer the best value (high score, low price).
Professional reviewers praise the Ultra 128 GB for its reliable read performance, solid random I/O that exceeds the A1 specification, and overall value, but caution that its U1/V10 write class makes it unsuitable for 4K or high-bitrate video work.
Everyday users consistently highlight fast photo transfers, smooth app performance on Android devices, and the sturdy SD adapter, while noting slower write speeds, occasional incompatibility with dashcams or drones, and rare corruption when the card is not ejected properly.
“True 128GB capacity”
“Fast and reliable”
“Great for cameras”
Professional reviewers from Manuals+.net, BensBargains and ImproveTheWorld.net praise the card for its high-speed transfer rates, reliable 4K video support and A2 app performance, noting it as a great deal and a top-selling Amazon Choice.
Everyday users consistently commend the card for delivering the advertised capacity, fast and dependable performance in cameras and drones, and exceptional price per gigabyte.
