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Small rectangular microSDXC card with gold contacts and Lexar branding, plus full-size SD adapter

Lexar

Lexar LSDMI128BBNL633A 128GB microSDXC UHS-I Class 10 memory card

SKU CH-Q8JN-GSXSV MPN LSDMI128BBNL633A

128 GB microSDXC card with UHS-I Class 10 speeds up to 95 MB/s read and 20 MB/s write, includes SD adapter

  • Total capacity128 GB
  • Speed classUHS-I / Class 10
  • Max read speedUp to 95 MB/s
  • Product typeMicroSDXC
  • Key featuresPremium memory solution for sports camcorders, tablets, and

Capacity 128GB

  • Read speed up to 95MB/s for quick file transfers
  • UHS-I Class 10 rating supports 1080p, 3D and 4K video capture
  • 128GB capacity stores thousands of photos and hours of HD video
  • Includes SD adapter for use in standard card slots
  • Tested across 1,200+ devices for broad compatibility

Lexar 128GB microSDXC UHS-I card

The Lexar LSDMI128BBNL633A is a 128GB microSDXC card rated UHS-I and Class 10. It targets users of sports camcorders, tablets and smartphones who need dependable storage for media capture. An SD adapter is included for wider device compatibility.

Sustained write behaviour

The card leverages UHS-I technology for a read speed up to 95MB/s (633x) and a write speed of 20MB/s. This supports continuous capture of 1080p full-HD, 3D and 4K video without dropped frames. Class 10 rating guarantees minimum performance on non-UHS host devices.

Thermals and power in use

Memory cards draw minimal power and produce no audible noise during operation. Extensive testing across more than 1,200 digital devices in Lexar Quality Labs ensures reliability under normal temperatures. No active cooling is required for typical recording workloads.

How it compares

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

Price $21.99
Cheaper than about 76% of the 1,947 comparable items (median $46.99).
Total capacity 128 GB
Higher than about 60% of the 1,132 comparable items (median 64 GB).
Price per TB $171.80 per TB
Cheaper than about 87% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameLexar
Product lineHigh-Performance 633x
Model nameLSDMI128BBNL633A
Total capacity128 GB
Product typeMicroSDXC
Performance
Speed classUHS-I / Class 10
Max read speedUp to 95 MB/s
Size & build
Shipping weight0.02 kg
Package size138 × 99 × 8 mm

Other versions of this model

4 more in the same range

Questions about this item

Does the 95 MB/s read speed generate noticeable heat or power draw during all-day 4K recording?

The card draws minimal power typical of UHS-I media and runs cool even during sustained 4K capture.

My action camera only takes microSD — is the bundled SD adapter required for it to work?

No, the microSDXC card works directly in any microSD slot; the adapter is only needed for full-size SD readers.

Will this 128 GB card work reliably in my older GoPro that only supports up to 32 GB?

Lexar verifies compatibility with GoPro models from 32 GB to 256 GB, so the 128 GB version is supported.

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