Lexar
Lexar High-Performance 633x Series 128GB microSDXC Memory Card with Adapter
Best high-capacity storage for mobile devices and action cameras.
Boost your mobile device and action camera performance with the Lexar 128GB High-Performance 633x microSDXC card. It's engineered to handle large files, including 1080p Full-HD, 3D, and 4K video, with ease. Experience swift data transfers thanks to UHS-I technology, delivering read speeds up to 100MB/s and write speeds up to 45MB/s. Ideal for smartphones, tablets, and action cameras, this card offers dependable performance. The included SD adapter provides enhanced compatibility and convenience for effortless file management.
$28.99
Owner Satisfaction
4.6
/ 5
Category Rank
122
/ 753
#122 in Flash Memory Cards
Price vs Category Average
-58%
Below average
Capacity
128
/ GB
Who it's for
- Casual users needing fast file transfers for daily tasks
- Budget-conscious shoppers seeking high capacity and included adapters
- General device owners using smartphones, tablets, and HD cameras
Who should skip it
- Professional photographers requiring high-speed burst or 4K recording
- Power users needing fast app loading and sustained throughput
- Content creators demanding professional-grade durability and performance
Performance breakdown
Read Speed
Swift 100MB/s transfers make offloading large media files feel nearly instantaneous.
Write Performance
Reliable 45MB/s speeds handle 4K recording without dropping frames during capture.
App Responsiveness
A1 rating ensures mobile applications launch and run with minimal lag.
Device Compatibility
Included adapter bridges the gap between mobile devices and full-sized cameras.
Multimedia Versatility
V30 speed class provides the necessary bandwidth for demanding high-definition video.
Long-term Reliability
Lifetime warranty offers peace of mind for your most important digital assets.
Key Specs
Capacity
128 GB
Read Speed
Up to 100 MB/s
Write Speed
Up to 45 MB/s
Speed Rating
C10, U3, V30, A1
Form Factor
microSDXC
Interface
UHS-I
Included Units
1 (with SD adapter)
Grade
Commercial
Features
- Capture and transfer 4K video quickly.
- High-speed performance for action cameras.
- Includes SD adapter for versatile use.
- Rated for demanding multimedia recording.
- Optimized for smartphones and tablets.
- UHS-I technology ensures fast data transfer.
- A1 rating for improved app performance.
- Backed by a lifetime warranty.
What customers say
This Lexar microSDXC card is highly regarded for its exceptional value and reliability. Users consistently report performance near the advertised speeds, making it excellent for demanding tasks like improving Nintendo Switch load times and efficiently managing large photo libraries or 1080p video capture. The included SD adapter adds welcome versatility. While intensive 4K recording might occasionally strain write speeds, the overall durability and dependable operation set it apart from generic options. Customers feel this card delivers premium dependability without the premium cost, solidifying its status as a top recommendation for dependable, high-capacity storage.
Know before you buy
Yes, this card is rated V30 and U3, which means it is designed to handle the sustained write speeds required for recording 4K video reliably.
The A1 rating indicates that the card is optimized for app performance. It allows your device to launch and run apps directly from the memory card more smoothly than standard cards.
Yes, it includes a microSD to SD adapter, allowing you to use the card in devices that require a standard SD form factor, such as many digital cameras and laptop card readers.
No, this specific model is not rated for waterproof, shockproof, or X-ray proof protection. It is best suited for standard indoor or outdoor environments where extreme physical hazards are not a concern.
This card is backed by a lifetime warranty, providing long-term peace of mind for your data storage needs.
The 100MB/s read speed is a maximum theoretical limit. Your actual transfer speeds will depend on your device's hardware capabilities and the type of files you are moving.
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