SanDisk Ultra 128GB SDXC
Score: 87/100
Silicon Power 128GB microSDXC
Score: 82/100Rankings
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.
Silicon Power's 128 GB microSDXC card offers near-premium UHS-I performance with up to 100 MB/s read and 80 MB/s write, rugged durability, and A2 app support, making it a budget-friendly choice for 4K video, gaming, and mobile storage. The inclusion of an SD adapter adds versatility, though some variants have slower write speeds and occasional quality control issues.
| Attribute | | |
|---|---|---|
128 GBbest | 128 GBbest | |
100 MB/sbest | 100 MB/sbest | |
63 MB/s | 80 MB/sbest | |
10 yearsbest | 5 years | |
| ↓ lower better | 8 gbest | 9 g |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage & Capacity(1) | ||
Card Type | SDXC | microSDXC |
Performance(4) | ||
UHS Speed Class | U1 | U3 |
Video Speed Class | V10 | V30 |
Maximum Write Speed (MB/s) | 63 MB/s | 80 MB/s |
Application Performance Class | A1 | A2 |
Compatibility(1) | ||
Compatible Devices | Broad device compatibility via SD adapter | Smartphones, tablets, drones, Android tablets, tablet PCs, action cameras, DSLR, 4K/Full HD camcorder, Nintendo Switch |
Warranty(1) | ||
Warranty Period (years) | 10 years | 5 years |
Physical(1) | ||
Weight (g) | 8 g | 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.
“Works perfectly with my Nintendo Switch - loads games fast and no lag.”
“Used it for 6 months on my drone - survived rain and extreme heat.”
“Great for 4K video on my Sony camcorder - no dropped frames.”
Professional reviewers position the Silicon Power 128GB as a cost-effective challenger that delivers near-premium performance. The Superior Pro UHS-I version is praised for its 80 MB/s write speed, making it suitable for 4K video on drones and action cams, while the A2 variant is highlighted for its superior app performance on Android and Nintendo Switch devices.
Everyday users consistently rate the card 4.5+ stars, lauding its fast load times on the Nintendo Switch, rugged build that survives rain and heat, and reliable 4K video capture without dropped frames. The most common complaints revolve around occasional mislabeled units, slower-than-advertised write speeds on some devices, and rare premature failures.
