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Editor's Choice

SanDisk

[Older Version] SanDisk 128GB Ultra MicroSDXC UHS-I Memory Card with Adapter - 100MB/s, C10, U1, Full HD, A1, Micro SD Card - SDSQUAR-128G-GN6MA

4.7
Based on 219,879 reviews
Best Price$14.80
In Stock
Independent Analysis
No paid placements

Quick Takeaways

  • 1
    Budget 128GB microSDXC card delivering reliable 100MB/s read speeds and A1 app performance for Android devices
  • 2
    Exceptional value with 4.7/5 rating from 219k+ reviews, ideal for phones, cameras, and Nintendo Switch
  • 3
    Wide compatibility but some users report durability issues after heavy use
  • 4
    Actual usable space ~119GB; great for Full HD video but not optimized for 4K

Customer Ratings

4.7out of 5

Based on 219,879 Amazon customer ratings

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Get Best Price on Amazon
$14.80

Should You Buy It?

Our expert verdict

The SanDisk 128GB Ultra MicroSDXC UHS-I Memory Card is a reliable and cost-effective solution for expanding storage on various devices. With high read and write speeds, wide compatibility, and an affordable price point, this card meets the needs of many users. The A1-rated performance is a significant advantage for those who frequently load apps on their devices.

However, potential buyers should be aware of the mixed reports on durability and the fact that actual user storage may be less than advertised. Despite these minor drawbacks, the SanDisk 128GB MicroSD card offers excellent value for money and is a solid choice for anyone needing additional storage space. If you're willing to take precautions with backups and handling, this card is well worth considering.

Value Assessment

Is it worth your money?

9/ 10

Exceptional Value

Why This Score?

At $0.15 (effectively ~$0.001/GB), it crushes competitors like Samsung EVO Select on price while matching everyday speeds and capacity. Backed by massive review volume, it's perfect for casual users avoiding premium markups on Extreme models. Minor durability trade-offs don't detract from its unbeatable bang-for-buck.

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Expert Insight

What our experts say

""The SanDisk Ultra microSDXC cards offer the best balance of price, capacity, and performance for most users' needs, especially in phones and tablets." - According to PCMag's 2023 microSD roundup."
— Expert Review Analysis

How It Compares

ProductKey Differences
[Older Version] SanDisk 128GB Ultra Micr...This Product
The product being reviewed
Samsung EVO Select 128GBSimilar 130MB/s reads but A2 app rating for better random I/O; often $2-3 cheaper with superior endurance ratings
SanDisk Extreme 128GBFaster 160MB/s reads, V30/A2 for 4K/pro use, IP55 water/shockproof; costs 50-100% more
Lexar Professional 633x 128GBMatches 100MB/s speeds, V30 for reliable 4K; better sustained writes but lacks adapter and A1 rating

What We Loved

  • High storage capacity
  • Fast read and write speeds
  • Compatible with a wide range of devices
  • Affordable price point
  • A1-rated performance for app loading

Room for Improvement

  • Mixed reports on durability
  • Actual user storage less than advertised

Perfect For

  • Android smartphone and tablet users
  • Chromebook owners
  • Those needing high-speed storage expansion
  • Users looking for cost-effective storage solutions

Skip If

  • Users requiring the highest durability
  • Those who need the full advertised storage capacity

In-Depth Review

Our comprehensive analysis

SanDisk 128GB MicroSD: Reliable Storage Solution

In the age of digital devices, expandable storage is crucial. The SanDisk 128GB Ultra MicroSDXC UHS-I Memory Card offers a cost-effective way to increase storage capacity for a variety of devices, from smartphones to cameras. With high-speed performance and compatibility with multiple platforms, this memory card promises to be a reliable storage solution.

In this comprehensive review, we'll delve into the performance, reliability, and overall value of the SanDisk 128GB MicroSD card. We'll explore its speed, compatibility, and real-world usage based on customer feedback. Whether you're a tech enthusiast or a casual user, this review will help you determine if this memory card meets your needs.

Performance and Speed

The SanDisk 128GB MicroSD card boasts impressive read speeds of up to 100MB/s, allowing for quick transfer of large files. This speed is particularly beneficial for transferring photos and videos, with the ability to move up to 1000 photos in a minute. The card's A1-rated performance also ensures faster app loading, enhancing the user experience on compatible devices.

Compatibility and Versatility

One of the strengths of the SanDisk 128GB MicroSD card is its wide compatibility. Certified to work with Android smartphones, tablets, and Chromebooks, this card is versatile enough to meet various storage needs. Customers appreciate the flexibility of using the card across different devices, making it a convenient solution for expanding storage.

Reliability and Durability

While the majority of customers report positive experiences with the SanDisk 128GB MicroSD card, there are mixed reports on durability. Most users find the card reliable, with no issues during regular use. However, a small percentage of customers have experienced card failures or data loss, highlighting the importance of regular backups and cautious handling.

Value for Money

Priced competitively, the SanDisk 128GB MicroSD card offers excellent value for money. Customers consistently praise the card's affordability, especially when considering its high storage capacity and fast performance. For those looking to expand their device's storage without breaking the bank, this card is an attractive option.

Verdict

The SanDisk 128GB Ultra MicroSDXC UHS-I Memory Card is a reliable and cost-effective solution for expanding storage on various devices. With high read and write speeds, wide compatibility, and an affordable price point, this card meets the needs of many users. The A1-rated performance is a significant advantage for those who frequently load apps on their devices.

However, potential buyers should be aware of the mixed reports on durability and the fact that actual user storage may be less than advertised. Despite these minor drawbacks, the SanDisk 128GB MicroSD card offers excellent value for money and is a solid choice for anyone needing additional storage space. If you're willing to take precautions with backups and handling, this card is well worth considering.

Rating: 4.7/5

Recommended For:

  • Android smartphone and tablet users
  • Chromebook owners
  • Those needing high-speed storage expansion
  • Users looking for cost-effective storage solutions

Not Recommended For:

  • Users requiring the highest durability
  • Those who need the full advertised storage capacity

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Technical Specifications

Complete product details

Color
‎Grey, Grey,Red
Special Feature
‎Drop Proof, Temperature Proof, Water Proof, X Ray Proof
Read Speed
‎100 Megabytes Per Second
Item Weight
‎0.01 Pounds
Warranty Type
‎Manufactured warranty
Write Speed
‎40x
Hardware Interface
‎microSDXC
Secure Digital Association Speed Class
‎Class 10
Product Dimensions
‎0.03"L x 0.59"W
Manufacturer
‎Western Digital Technologies Inc.
UPC
‎619659160395
Global Trade Identification Number
‎00619659160395, 00880924867213
RAM
‎128 GB
Hard Drive
‎128 GB Memory Card
Item model number
‎SDSQUAR-128G-GN6MA
Item Weight
‎0.16 ounces
Item Dimensions LxWxH
‎0.03 x 0.59 x 0.1 inches
Department
‎Memory
ASIN
‎B073JYC4XM
Is Discontinued By Manufacturer
‎No
Date First Available
‎July 1, 2017
Customer Reviews
4.7 4.7 out of 5 stars 219,879 ratings 4.7 out of 5 stars
Best Sellers Rank
#182 in Micro SD Memory Cards
Brand
SanDisk
Model Name
SanDisk Ultra 128GB microSDXC UHS-I card with Adapter - SDSQUAR-128G-GN6MA
Flash Memory Type
Micro SD
Memory Storage Capacity
128 GB
Compatible Devices
Smartphone, Tablet

Frequently Asked Questions

Common questions answered

Yes, it's widely used for Switch storage expansion, with A1 rating ensuring fast game/app loading.
Advertised 100MB/s read; writes typically 60-80MB/s in benchmarks like CrystalDiskMark.
About 119GB after formatting, due to binary vs decimal GB conversion.
Rated for Full HD (C10/U1); suitable for 1080p but may stutter on high-bitrate 4K without V30 rating.
Lifetime limited warranty from SanDisk; buy from authorized sellers and verify via SanDisk's authenticity tool using serial number.
Ultra is budget-oriented (U1/A1); Extreme offers faster speeds (V30/A2) and better durability for ~2x price.
Compatible with most GoPro, DJI drones for 1080p; check device specs for UHS-I support.

Community Q&A

Questions from real customers

Price History

Track price changes over time

Price History (Last 180 days)

Customer Insights

What customers are saying

7Positive
1Mixed
0Negative

Functionality

Positive

Card quality

Positive

Value for money

Positive

Storage capacity

Positive

Speed

Positive

Reliability

Positive

About This Review

Written by Theo Armand

Theo Armand

Theo Armand

Expert Reviewer

Contributing Editor

Theo tackles everyday tech at Review Atlas—air purifiers, robot vacuums, and smart ranges that claim to “learn.” He benchmarks suction, filtration, and energy use with the same discipline he once applied to industrial HVAC projects. His reviews balance lab numbers with lived‑in testing, surfacing products that perform when your home is actually messy.

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How We Review This Product

Our independent, data-driven research process

Our Research Process

  • We analyze the full manufacturer specifications and compare them against competing products
  • We synthesize verified customer feedback to surface recurring praise and complaints
  • We track pricing and availability so recommendations reflect real value at today's prices
  • Manufacturers cannot pay for placement, scores, or favorable coverage
  • Evaluated using our Electronics Accessories & Supplies review criteria
Learn more about how we review products
Last updated: October 25, 2025
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