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Red microSD card with white SanDisk Extreme branding, 128GB capacity, UHS-I speed class markings visible

SanDisk

SanDisk Extreme 128GB microSD UHS-I SDSQXH9-128G-GZ6MA

SKU CH-5DTB-HQ42K MPN SDSQXH9-128G-GZ6MA

Stores 128GB of 5.3K and 4K UHD footage with U3 and V30 ratings, reaching 245MB/s read and 120MB/s write speeds

  • Total capacity128 GB
  • Memory card formatMicroSD
  • Speed classA2 / U3 / V30
  • Max read speedUp to 245 MB/s
  • Write throughputUp to 120 MB/s
  • Product typeMicroSD

Capacity Extreme® 128GB

  • Up to 245MB/s read speed accelerates file transfers
  • Up to 120MB/s write speed enables 5.3K video capture
  • 128GB capacity stores extended recording sessions
  • A2 rating loads applications faster on Android devices
  • U3 and V30 ratings sustain 4K UHD video recording

Built for Action Cams and Drones

The SanDisk Extreme 128GB microSD UHS-I card targets enthusiasts and creators who capture 5.3K point-of-view footage or 4K UHD aerial video. Its A2 rating means apps launch quickly and run smoothly on Android devices, laptops and handheld gaming consoles. The 128GB capacity provides room for extended recording sessions without frequent offloading.

Simple Drop-In Upgrade

Installation is a straightforward card-slot insertion; no drivers or tools are required. The most common issue is using a device or reader limited to UHS-I speeds, which caps the 245MB/s read and 120MB/s write potential. Ensure the host supports U3 and V30 video speed classes to avoid dropped frames during high-bitrate capture.

128GB Headroom for High-Bitrate Work

At 128GB the card comfortably holds hours of 4K UHD or 5.3K footage and large burst-photo sequences. Sustained write speed of 120MB/s meets the V30 guarantee of 30MB/s minimum, keeping pace with demanding codecs. Very long 5.3K sessions or simultaneous multi-camera shoots will eventually fill the space and demand offload.

How it compares

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

Price $28.99
Cheaper than about 66% 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 $226.48 per TB
Cheaper than about 75% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Product lineExtreme
Model nameSDSQXH9-128G-GZ6MA
Total capacity128 GB
Product typeMicroSD
Performance
Speed classA2 / U3 / V30
Max read speedUp to 245 MB/s
Write throughputUp to 120 MB/s
Storage
Memory card formatMicroSD
Size & build
Shipping weight0.05 kg
Package size152 × 102 × 3 mm

Other versions of this model

5 more in the same range

Questions about this item

How can I verify the card delivers the rated 245MB/s read and 120MB/s write speeds after setup?

Run a benchmark tool such as CrystalDiskMark or ATTO on a UHS-I reader; sequential results should approach 245MB/s read and 120MB/s write, while sustained write during 5.3K recording should stay above the V30 30MB/s floor.

What comes in the package and is a separate adapter required for full-size SD slots?

The box contains the 128GB microSDXC card only; a microSD-to-SD adapter is not included and must be purchased separately if your device uses a full-size slot.

Which speed-class rating matters most for 5.3K capture — A2, U3 or V30?

V30 guarantees the minimum 30MB/s sustained write needed for 5.3K video, while U3 mirrors that guarantee and A2 rates app-loading IOPS for Android devices.

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