Lexar High-Performance 633x 256GB
Score: 60/100
Samsung PRO Endurance 128GB
Score: 78/100Rankings
The Samsung PRO Endurance 128 GB microSDXC offers industry-leading endurance and rugged 6-proof durability, making it ideal for continuous surveillance. Its trade-off is modest read/write speeds that lag behind premium performance cards. Best for dash cams, body cams and security systems where reliability outweighs speed.
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/sbest | 100 MB/sbest | |
45 MB/sbest | 40 MB/s | |
| ↓ lower better | 453.6 g | 0.25 gbest |
— | 5 yearsbest | |
| ↓ lower better | 1.02 mm | 1 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(2) | ||
Write Speed (MB/s) | 45 MB/s | 40 MB/s |
Speed Class | C10 | Class 10 |
Design(3) | ||
Form Factor | microSDXC | microSD |
Weight (g) | 453.6 g | 0.25 g |
Thickness (mm) | 1.02 mm | 1 mm |
General(1) | ||
Compatibility | wide compatibility with any UHS‑I device while remaining backward compatible with Class 10, V10 and U1 standards | Dash Cam, Body Cam, Security Camera |
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.
“Never received it”
Professional reviewers praise the PRO Endurance for its enterprise-grade NAND, unmatched 128 GB endurance capacity, and rugged 6-proof construction, positioning it as the go-to solution for always-on recording. However, they acknowledge the intentional speed trade-off, noting it is slower than performance-oriented cards and thus less suited for high-speed tasks.
User feedback is sparse; the only specific comment found was a negative fulfillment experience where the buyer never received the product.
