Lexar High-Performance 633x 256GB
Score: 60/100
Samsung PRO Plus 128GB
Score: 85/100Rankings
The Samsung PRO Plus 128 GB microSDXC delivers top-tier read/write speeds and strong durability, ideal for 4K video creators and mobile gamers. Its main limitation is reduced performance on older, non-UHS-I devices and a warranty that does not cover continuous-write scenarios. Best suited for photographers, drone pilots and gamers who need speed and ruggedness.
Lexar's 256 GB 633x microSDXC offers up to 100 MB/s read speed, a V30 rating, and includes a micro-SD to SD adapter for versatile use. Its slower 45 MB/s write speed and lack of waterproofing limit high-end video applications. Suitable for smartphones, tablets and action cameras where large capacity and broad compatibility are priorities.
| Attribute | | |
|---|---|---|
256 GBbest | 128 GB | |
100 MB/s | 180 MB/sbest | |
45 MB/s | 130 MB/sbest | |
| ↓ lower better | 453.6 gbest | — |
— | 10 yearsbest | |
| ↓ lower better | 1.02 mmbest | — |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
Storage(1) | ||
Capacity (GB) | 256 GB | 128 GB |
Performance(3) | ||
Read Speed (MB/s) | 100 MB/s | 180 MB/s |
Write Speed (MB/s) | 45 MB/s | 130 MB/s |
Speed Class | C10 | Class 10 |
Design(1) | ||
Form Factor | microSDXC | microSD |
General(1) | ||
Compatibility | wide compatibility with any UHS‑I device while remaining backward compatible with Class 10, V10 and U1 standards | Android Smartphones, Tablets, GoPRO, DJI Drone |
Products in the top-left offer the best value (high score, low price).
Professional testing shows the Lexar 633x card delivers real-world read speeds near 97 MB/s and write speeds around 69 MB/s, surpassing its advertised specifications and confirming its suitability for 4K video capture. Reviewers acknowledge its solid mid-range performance but point out that newer Lexar BLUE models provide higher peak speeds, making the 633x less compelling for users seeking top-tier throughput.
Everyday users praise the large 256 GB capacity, the included SD adapter for easy file transfer, and the peace of mind from the lifetime warranty. They also highlight the card's reliable 4K video performance and compatibility with a wide range of devices. However, some users note the write speed feels modest compared to newer offerings, and the lack of UHS-II support limits its appeal for high-end professional use.
“Supercharged write speeds... capture seamless 4K videos on compatible phone or drone”
“Expanded storage... play more high-performance games.”
“Enables raw/JPEG bursts and UHD video reliably.”
Professional reviewers praise the PRO Plus for its supercharged read/write performance that makes 4K video recording and raw photo bursts seamless, while also noting its robust construction and broad device compatibility. However, they warn that the advertised speeds are contingent on using a UHS-I capable host, so older devices may not experience the full benefit.
Consumers consistently highlight the card's speed and durability as major strengths, especially for mobile photography, drone footage, and handheld gaming. The most common complaints revolve around reduced performance on non-UHS-I devices and the warranty's exclusion of high-write use cases.
