Quick Verdict
The Amazon Basics 128GB microSDXC card is a U3, A2 card that comes with a full-size SD adapter and is listed at read speeds up to 100 MB/s. For cameras, drones, and phones where you want a budget card with higher video and app ratings, it is a strong value pick. The trade-off is a lower maximum read speed than the SanDisk Ultra.
Check Amazon Basics 128GB microSDXC price on Amazon
Comparing cards? See our SanDisk Ultra vs Amazon Basics comparison.
As an Amazon Associate I earn from qualifying purchases. This review is based on the manufacturer’s specifications and published retailer listings.
Table of Contents
Amazon Basics 128GB microSDXC Specifications
| Feature | Details |
| Model | LSMICRO128GU3 |
| Capacity | 128 GB |
| Type | microSDXC with full-size SD adapter |
| Read speed | Up to 100 MB/s |
| Speed classes | Class 10, U3, A2 |
| Listed media speed | 60 MB/s |
| Listed features | Magnetic proof |
| Compatible devices | Cameras, drones, laptops, smartphones, and tablets, per the listing |
| Warranty | 12 months, per the listing |
Pros and Cons
Pros
- U3 rating suits Full HD and 4K video recording
- A2 app-performance rating, a step above A1, on supported devices
- Includes a full-size SD adapter
- Up to 100 MB/s read speed
- Budget-friendly brand from Amazon
Cons
- Lower maximum read speed than the SanDisk Ultra’s 140 MB/s
- A2 benefits depend on your device supporting it
- 12-month warranty, shorter than some dedicated memory-card brands offer
- Quoted speeds are maximums that depend on your device
Performance and Real-World Use
Video and cameras
The U3 rating guarantees a minimum sustained write speed of 30 MB/s, which makes this card a good fit for 4K video on cameras, drones, and action cams. It also suits dash cams and general photo storage.
Apps and phones
The A2 rating is a higher app-performance class than A1, but you only see the benefit on devices that support it. For everyday phone, tablet, and laptop storage, it works like any other microSD card.
Who Should Buy the Amazon Basics 128GB microSDXC?
A great fit if you…
- want a budget card with U3 video and A2 app ratings
- shoot video on a camera, drone, or action cam
- want a full-size SD adapter included
Look elsewhere if you…
- want the highest possible read speeds for file transfers
- prefer a longer manufacturer warranty
- need more than 128 GB of space
Alternatives to Consider
- SanDisk 128GB Ultra: a faster-reading card with U1 and A1 ratings. Read our review.
- SanDisk Extreme: a faster SanDisk line with A2 and U3 ratings.
- 256 GB cards: a larger-capacity option if you fill 128 GB quickly.
Browse more gear in our gear review hub.
Frequently Asked Questions
Is the Amazon Basics 128GB microSDXC card good for 4K video?
It is rated U3, which meets the minimum sustained write speed for 4K video on compatible devices.
Does it come with an SD adapter?
Yes. A full-size SD adapter is included.
How fast is it?
It is listed at up to 100 MB/s read speed. Actual speeds depend on your device.
What does A2 mean?
A2 is an app-performance rating that is higher than A1, and it helps on devices that support it.
Final Verdict on the Amazon Basics 128GB microSDXC
For a low-cost card with U3 and A2 ratings and a full-size adapter, this Amazon Basics card is a practical choice for cameras, drones, and everyday storage. Pick the SanDisk Ultra if faster read speeds matter more to you.