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SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle — main product image
SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle
SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle
SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle
SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle
SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle
SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle
SanDisk

SanDisk SDSQUAR-128G-GN6MN 128GB MicroSD Card Bundle

★★★★★4.5 (117 reviews)

100MB/s read speed and A1 app performance in a 128GB microSD that survives the environments your phone doesn't always.

$16.35*
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*Price sourced from Amazon.com. Last updated:Jun 19, 2026.Price and availability are subject to change.

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Overview

The SanDisk Ultra 128GB microSDXC is a UHS-I, U1, Class 10, A1-rated flash storage card bundled with an Everything But Stromboli USB-A card reader. The headline spec is 100MB/s sequential read — at the practical ceiling of the UHS-I bus — which means transferring a full card of photos or video to a computer is fast enough to not be a workflow interruption. The A1 application performance rating is the less-discussed but equally important spec for Android users: it certifies the minimum random I/O performance required for apps to run responsively when stored on the card, rather than the performance cliff you get from unrated cards used for app storage.

The card carries SanDisk's four-way durability certification — waterproof, temperature-proof, shockproof, and X-ray-proof — making it a reliable choice for travel, outdoor use, and environments where cards get dropped or exposed to temperature extremes. At 128GB it sits in the practical sweet spot for Android storage expansion: enough capacity to hold a meaningful photo and video library without paying the premium of higher-tier capacities. The included card reader adds utility for PC or Mac transfer workflows, though its USB-A connector is a compatibility caveat worth noting on USB-C-primary machines. This is a well-specified card at a mainstream capacity — for users who have outgrown their device's internal storage and want a dependable, fast expansion solution.

Key Features

Bundle includes (1) SanDisk 128GB microSD card and (1) Everything But Stromboli (TM) Micro Card Reader

Compatible with Samsung Galaxy Note 8, Note 9, and Note Fan Edition Cell Phones

Read speeds up to 100mb/s; rated A1 for faster app performance and UHS Speed Class U1 and Speed Class 10 for Full HD video recording and playback

Shockproof, temperature-proof, waterproof, and X-ray-proof

Ideal for Android-based tablets and smartphones for more expandable storage

Specifications

Brand
SanDisk
Model
SDSQUAR-128G-GN6MN
Capacity
128GB
Read Speed
Up to 100MB/s
Speed Class
UHS-I Class 10 (U1)
App Performance Class
A1
Form Factor
microSDXC
Durability
Waterproof, Temperature-proof, Shockproof, X-ray-proof
Included Accessories
Everything But Stromboli USB-A Micro Card Reader

Pros & Cons

👍 Pros

  • 100MB/s sequential read speed makes file transfers to a computer via the included card reader noticeably faster than Class 10-minimum cards
  • A1 app performance rating delivers the random I/O floor needed for responsive app loading on Android devices using the card for app storage
  • 128GB capacity provides substantial headroom for photo libraries, 1080p video, and app data without card swapping
  • Four-way environmental protection — waterproof, shockproof, temperature-proof, X-ray-proof — makes the card itself survivable in demanding storage and transit conditions
  • Bundle includes a USB-A card reader, eliminating the need for a separate peripheral purchase to transfer files to a computer

👎 Cons

  • U1 speed class guarantees only 10MB/s minimum write — not rated for 4K video recording workflows that require U3 or V30 specification
  • Included card reader uses USB-A, requiring an adapter for use with USB-C-only systems — the adapter is not bundled
  • Environmental protection ratings apply to the microSD card only; the bundled reader has no stated durability specification
  • Read speed of 100MB/s is at the upper bound for UHS-I — accessing this performance requires a UHS-I-compatible host device; older devices will cap at lower bus speeds
  • No SD adapter is included in this bundle for use in full-size SD card slots on cameras or laptops

Frequently Asked Questions

A1 is an Application Performance Class rating defined by the SD Association. It mandates a minimum of 1,500 IOPS read and 500 IOPS write — the random I/O performance required for apps to launch and run from the card without perceptible lag. On Android devices that support adoptable storage or store app data on the microSD, A1 is a meaningful spec; on devices that only use the card for media storage, sequential read speed is the more relevant figure.
SanDisk rates this card at UHS-I U1 / Class 10, which guarantees a minimum 10MB/s sequential write — sufficient for 1080p Full HD video recording. Write speeds in practice will vary by device and workload but are not a bottleneck for standard smartphone video. 4K video recording at higher bitrates may require a U3-rated card.
The Everything But Stromboli card reader included in this bundle uses a standard USB-A connector. For use with modern laptops or phones that have only USB-C ports, you will need a USB-A to USB-C adapter, which is not included.
The waterproof, temperature-proof, X-ray-proof, and shockproof ratings apply to the SanDisk microSD card only. The included card reader carries no stated environmental protection rating.
Yes. This is a standard microSDXC card compatible with any device that accepts microSDXC media — including Android smartphones, tablets, action cameras, drones, and Nintendo Switch. The Samsung Galaxy compatibility listed is illustrative, not exclusive.

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