
Amazon Basics microSDXC 1TB
Score: 78/100
ProGrade Digital V90 Iridium 256GB
Score: 75/100Rankings

Amazon Basics 1TB microSDXC delivers budget-friendly high-capacity storage with up to 100 MB/s read and 80 MB/s write, featuring IPX6 waterproof and shockproof protection. Speed can vary across devices and older hardware may face compatibility limits. Ideal for cost-conscious photographers and gamers needing large space.

The ProGrade Digital 256 GB SDXC UHS-II V90 card delivers top-tier read/write speeds and robust V90 certification for professional video capture. Its main drawbacks are the premium cost and reduced performance on UHS-I-only devices. Ideal for videographers needing reliable 6K/4K RAW recording in demanding environments.
| Attribute | ![]() | ![]() |
|---|---|---|
1,024 GBbest | 256 GB | |
100 MB/s | 300 MB/sbest | |
80 MB/s | 275 MB/sbest | |
| ↓ lower better | 0.91 gbest | — |
1 years | 3 yearsbest | |
| ↓ lower better | 0.97 mmbest | 2.1 mm |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Storage(1) | ||
Capacity (GB) | 1024 GB | 256 GB |
Performance(6) | ||
Read Speed (MB/s) | 100 MB/s | 300 MB/s |
Write Speed (MB/s) | 80 MB/s | 275 MB/s |
Speed Class | U3 | Class 10 |
UHS Speed Class | UHS-I | UHS-II |
Video Speed Class | V30 | V90 |
Interface | UHS-I | UHS-II |
Design(2) | ||
Form Factor | microSDXC | SDXC |
Thickness (mm) | 0.97 mm | 2.1 mm |
General(2) | ||
Warranty (years) | 1 years | 3 years |
Compatibility | Smartphones, tablets, cameras, GoPro/action cameras, laptops, computers, DSLRs, drones, game consoles | Canon, Sony, Nikon, Olympus, Panasonic, Fuji, Samsung |

Products in the top-left offer the best value (high score, low price).

Professional reviewers commend the Amazon Basics card for delivering sequential and random speeds that meet or surpass the SanDisk Extreme/Pro reference, maintaining cool operation during prolonged 4K/8K recording, and offering a compelling price-to-performance ratio.
Everyday users appreciate the card's accurate capacity, reliable adapter, and fast transfers without heat, noting it as a solid value for high-resolution media and app storage. Common themes include satisfaction with performance for typical use and occasional remarks about speed variability and the need to check device compatibility for larger capacities.

“performs faster than most high-end SanDisk cards”

“at least as good as, if not very slightly better”

“fast and cheap -- better than Sandisk”



Professional reviewers are not directly quoted in the available sources; the information consists mainly of manufacturer datasheets and retailer specifications that emphasize the card's high sustained speeds, durability and suitability for flagship cameras.
No consumer reviews or testimonials were found in the research, so everyday user sentiment cannot be summarized.