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Blue Lexar High-Performance 633x 256GB microSDXC card with SD adapter

Lexar

Lexar LSDMI256BBNL633A 256GB microSDXC memory card

SKU CH-Y8F8-248RV MPN LSDMI256BBNL633A

256 GB microSDXC card rated UHS-I U1 Class 10 with up to 95 MB/s read and 45 MB/s write for 1080p, 3D and 4K video capture

  • Total capacity256 GB
  • Speed classUHS-I / U1 / Class 10
  • Max read speedUp to 95 MB/s
  • Write throughputUp to 45 MB/s
  • Product typeMicroSDXC
  • Key featuresPremium memory solution for tablets, sports camcorders, and

Capacity 256GB

  • Read speeds up to 95MB/s for fast file transfers
  • Write speeds up to 45MB/s capture 4K video smoothly
  • 256GB capacity stores thousands of photos and videos
  • UHS-I Class 10 rating ensures reliable 1080p recording
  • 633x speed rating accelerates media playback and downloads

256GB microSDXC for action cameras

This Lexar High-Performance 633x card provides 256GB of storage for smartphones, tablets and sports camcorders. It captures, plays back and transfers 1080p full-HD, 3D and 4K video files quickly. The UHS-I U1 Class 10 rating supports sustained write performance for continuous recording. Buyers who need more capacity or faster sustained write speeds for professional cinema workflows should look elsewhere.

UHS-I bus limits transfer ceiling

The card leverages UHS-I technology with a read speed up to 95MB/s and a write speed up to 45MB/s. The 633x rating indicates a maximum transfer rate of 100MB/s under ideal conditions. Real-world throughput will be lower due to bus overhead, host controller limits and file-system fragmentation. Devices restricted to the older Class 10 interface without UHS-I support cannot reach these speeds.

Verify host device supports microSDXC UHS-I

Check that your smartphone, tablet or action camera accepts microSDXC cards up to 256GB and can utilise the UHS-I bus for full performance. Some older models only recognise microSDHC or cap capacity at lower limits. An SD adapter is included for use in full-size SD slots. Ensure firmware is current to avoid compatibility issues with high-capacity cards.

How it compares

Measured against everything we stock in SD & MicroSD Memory Cards, at today’s prices. Recalculated every night.

Price $41.99
Typical for this category: the median of 1,947 items is $46.99.
Total capacity 256 GB
Higher than about 80% of the 1,132 comparable items (median 64 GB).
Price per TB $164.02 per TB
Cheaper than about 89% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameLexar
Product lineHigh-Performance 633x
Model nameLSDMI256BBNL633A
Total capacity256 GB
Product typeMicroSDXC
Performance
Speed classUHS-I / U1 / Class 10
Max read speedUp to 95 MB/s
Write throughputUp to 45 MB/s
Size & build
Shipping weight0.01 kg
Package size140 × 102 × 8 mm

Other versions of this model

4 more in the same range

Questions about this item

Should I pick the 256GB 633x card or a smaller capacity for my phone?

The 256GB capacity holds far more 4K clips and apps than smaller sizes, while the 633x rating still delivers up to 95MB/s reads and 45MB/s writes for smooth recording.

Will the 95MB/s read speed actually move 4K footage off the card that fast in my laptop?

Real-world offloads typically hit the rated 95MB/s over a decent UHS-I reader, so a 256GB card full of 4K files clears in minutes rather than tens of minutes.

Does the UHS-I U1 Class 10 rating limit write performance in my action camera?

U1 guarantees a minimum 10MB/s sustained write; the card can burst to 45MB/s, so 1080p and 4K recording stays stable without dropped frames.

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