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Tiny black microSDXC card with red SanDisk label and gold contacts visible

SanDisk

SanDisk SDSQUAR-128G-GN6MN 128GB microSDXC UHS-I U1 Class 10 A1 100MB/s

SKU CH-YM6J-CHP1E

128 GB microSDXC card rated Class 10 and UHS-I U1 with 100 MB/s read speed for phones, cameras and other portable devices

  • Total capacity128 GB
  • Memory card formatMicroSD
  • Speed classClass 10
  • Max read speed100 MB/s
  • Write throughput500 MB per second
  • Product typeMicroSDXC
  • 128 GB capacity stores thousands of photos and videos
  • 100 MB/s read speed transfers large files quickly
  • Class 10 rating guarantees minimum 10 MB/s write performance
  • A1 qualification runs apps smoothly on Android devices
  • UHS-I U1 interface works with most microSDXC hosts

128 GB microSDXC card for mobile devices

The SanDisk SDSQUAR-128G-GN6MN is a 128 GB microSDXC card rated Class 10, UHS-I U1 and A1 for app performance. It targets smartphones, action cameras and other compact gear that need removable storage in the smallest mainstream form factor.

UHS-I interface and device compatibility

The card uses the UHS-I bus with a maximum read speed of 100 MB/s; sustained write speed is lower. Devices must support the microSDXC format (64 GB to 512 GB) to recognise this capacity; older hosts limited to microSD or microSDHC will not work.

128 GB capacity for apps and media

The 128 GB space holds thousands of photos, hours of Full HD video and installed applications thanks to the A1 rating. It fills quickly with 4K footage or large game libraries, so users capturing high-bitrate video or storing offline maps may need a larger card.

How it compares

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

Price $30.99
Cheaper than about 64% 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 $242.11 per TB
Cheaper than about 72% of the 901 comparable items (median $374.69 per TB).

Specifications

Product
Brand nameSanDisk
Model nameSDSQUAR-128G-GN6MN
Part numberSDSQUAR-128G-GN6MN
Total capacity128 GB
Product typeMicroSDXC
Performance
Speed classClass 10
Max read speed100 MB/s
Write throughput500 MB per second
Storage
Memory card formatMicroSD

Questions about this item

Should I choose this 128GB microSDXC or a smaller microSDHC card?

Pick the 128GB microSDXC if your device supports SDXC; it holds more apps and media. MicroSDHC tops out at 32GB, so you would need multiple cards for the same space.

What does the 100MB/s read speed mean when I put the card in my phone?

The 100MB/s read rate lets you open large photos and launch stored apps faster, though actual speed depends on your device's card controller and file system overhead.

How does the UHS-I U1 interface limit real-world performance?

UHS-I U1 guarantees a minimum 10MB/s sequential write, so sustained recording won't drop below that, while the 100MB/s read and 500MB/s write peaks are burst speeds the bus can briefly reach.

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