Is this card fast enough for 4K video?

Yes. SanDisk rates it for 4K UHD recording, with writes up to 90MB/s. Long continuous clips can slow the write rate.

What does the A2 rating mean?

A2 is an app performance class. It signals faster random read and write for loading and running apps stored on the card in a phone.

Will it work in a Nintendo Switch or Steam Deck?

It fits microSDXC slots, so it works in both. The Steam Deck benefits from the faster read speed; the Switch caps speeds lower.

Do I need a special reader to get full speed?

Yes. You need a UHS-I compatible reader and slot to reach the rated 160MB/s read speed. Older readers will run slower.

How does it compare with the Extreme Pro?

The Extreme Pro writes faster, which helps with burst shooting and long 4K clips. The Extreme is the better fit for lighter use.

Does it come with an SD adapter?

SanDisk sells this card both with and without a full-size SD adapter, so check the pack you choose.

Where is the SanDisk 128GB Extreme microSDXC Card cheapest?

At Walmart, for $37.79, as of our latest check.

What do buyers say about the SanDisk 128GB Extreme microSDXC Card?

Rated 4.6 out of 5 from 202 ratings.

SanDisk 128GB Extreme microSDXC Card

Best price now

$37.79at WalmartChecked Nov 8

Prices are checked against each store and labelled with when.

Visit Walmart

SanDisk 128GB Extreme microSDXC Card

Best price now

$37.79at WalmartChecked Nov 8

Prices are checked against each store and labelled with when.

Visit Walmart

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Price facts

Last seen at $37.79 at Walmart on Nov 8.

Our take on the SanDisk 128GB Extreme microSDXC Card

The SanDisk Extreme microSDXC is a high-speed memory card built for 4K UHD video, action cameras, drones and Android phones. It reads up to 160MB/s and writes up to 90MB/s, and it carries the A2 rating for faster app loading and launching on phones. It is a step above basic cards for sustained video capture, though the Extreme Pro line is faster still for heavy burst shooting. Owners rate it highly for reliability in cameras and drones.

Best forAction camera and drone pilots recording 4KAndroid phone users who want more storage and faster appsPhotographers shooting high-resolution stillsAnyone replacing a slow or full card

Pros

Up to 160MB/s read and 90MB/s write
A2 rating for fast app performance on phones
Handles 4K UHD and Full HD video
Works across phones, action cameras and drones
Strong owner ratings for reliability

Cons

Slower than the Extreme Pro for heavy burst shooting
Write speed drops during long sustained 4K recording
Needs a UHS-I compatible slot to hit rated speeds
Small card is easy to lose

SanDisk 128GB Extreme microSDXC Card prices at every store

WalmartNew
In stockSold by IFLASH INCReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$37.79+ $5.99 shippingChecked Nov 8
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What reviewers say

4.6 / 5202 ratings

Owners rate it 4.6 out of 5 and mostly praise its speed and dependability in cameras, drones and phones. Complaints center on write speed under sustained recording and on cards that failed or arrived slow.

What people mention

SpeedPraisedOwners say transfers and in-camera writes feel fast for the class.
ReliabilityMixedMost report dependable use, but some cards failed or tested below rated speed.
4K recordingMixedIt handles 4K, though sustained recording can slow the write rate.
ValuePraisedBuyers call it a solid balance of capacity and performance.

About the SanDisk 128GB Extreme microSDXC Card

The SanDisk Extreme microSDXC card is a 128GB memory card for Android smartphones, action cameras and drones. It records 4K UHD video and full HD video, and it captures high-resolution photos.

It reads at up to 160MB/s and writes at up to 90MB/s for fast file transfer. It is A2-rated, which gives fast application performance on a smartphone.

Capacity: 128GB
Card type: microSDXC
Read speed: Up to 160MB/s
Write speed: Up to 90MB/s
App rating: A2
Video: 4K UHD and full HD recording
Use with: Android smartphones, action cameras, drones

Specifications

color: MulticolorSource
size: 128GBSource

Questions and answers

Is this card fast enough for 4K video?: Yes. SanDisk rates it for 4K UHD recording, with writes up to 90MB/s. Long continuous clips can slow the write rate.
What does the A2 rating mean?: A2 is an app performance class. It signals faster random read and write for loading and running apps stored on the card in a phone.
Will it work in a Nintendo Switch or Steam Deck?: It fits microSDXC slots, so it works in both. The Steam Deck benefits from the faster read speed; the Switch caps speeds lower.
Do I need a special reader to get full speed?: Yes. You need a UHS-I compatible reader and slot to reach the rated 160MB/s read speed. Older readers will run slower.
How does it compare with the Extreme Pro?: The Extreme Pro writes faster, which helps with burst shooting and long 4K clips. The Extreme is the better fit for lighter use.
Does it come with an SD adapter?: SanDisk sells this card both with and without a full-size SD adapter, so check the pack you choose.
Where is the SanDisk 128GB Extreme microSDXC Card cheapest?: At Walmart, for $37.79, as of our latest check.
What do buyers say about the SanDisk 128GB Extreme microSDXC Card?: Rated 4.6 out of 5 from 202 ratings.