SANDISK 128GB Extreme microSD Card + Adapter, Up to 245MB/s Read Speeds
Bottom line: The SANDISK 128GB Extreme microSD Card + Adapter ($42.99 on Amazon as of 2026-10-06): U3 and V30 rated for sustained 4K UHD and 5.3K video capture; main trade-off: the 170MB/s write rating applies only to 256GB-1TB, not this 128GB.
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*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
Pros & Cons
Pros
- ✓ U3 and V30 rated for sustained 4K UHD and 5.3K video capture
- ✓ Read speeds up to 245MB/s speed up offloading footage
- ✓ Proofed against water, shock, drops, magnets, X-rays and heat
- ✓ Memory Zone app handles backup and transfer on desktop or Android
Cons
- ✗ The 170MB/s write rating applies only to 256GB-1TB, not this 128GB
- ✗ 128GB fills fast at 5.3K bitrates on long shoots
- ✗ UHS-I caps throughput below newer UHS-II and SD Express cards
- ✗ Needs a UHS-I capable reader to hit the full 245MB/s read speed
Manufacturer description
CAPTURE LARGER THAN LIFE. Unlock startling 5K[3] point-of-view and pristine high-res stills with video speed class ratings of U3 and V30[4]. SPEED BARRIERS SHATTERED. Save precious moments with rapid read speeds up to 245MB/s[2] and write speeds up to 170MB/s[2] [256GB-1TB capacities[1]]. MAXIMIZE WITH MASSIVE CAPACITY. Record longer and store more with up to 2TB[1] of storage.
SpecPicks Verdict
SpecPicks scored SANDISK 128GB Extreme microSD Card + Adapter using a rating × review-volume × price-fit model applied to published specs and reviews across the external storage category. Sandisk's external storage lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for external storage of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Is this card fast enough for 4K video on a GoPro or DJI drone?
Yes. It carries U3 and V30 video speed class ratings, which guarantee a 30MB/s minimum sustained write - the floor action cams and drones need for 4K UHD, and it is rated up to 5K point-of-view capture.
Does the 128GB version really write at 170MB/s?
No. Sandisk lists the up-to-170MB/s write speed for the 256GB through 1TB capacities. This 128GB card is rated up to 245MB/s read; treat the U3/V30 class ratings as the guaranteed sustained write floor.
How much 4K video fits on 128GB?
It depends entirely on your camera's bitrate and codec, which Sandisk does not publish for this card. Check your camera's recording specs to estimate runtime, and carry a spare if you shoot long 5.3K sessions.
Will it survive getting wet or dropped on a shoot?
Sandisk rates the Extreme line as temperature proof, humidity proof, waterproof, shock proof, drop proof, magnet proof, X-ray proof, and wear-out proof, which is why it is positioned for helmet cams, drones, and outdoor use.
Does it work with Android phones and what software is included?
Yes, it is listed for Android devices alongside action cams and drones. The SanDisk Memory Zone app, available for desktop and Android, backs up, organizes, and transfers your photos and videos.
What warranty does this card come with?
Warranty terms are not listed in the product details here. Check the current Amazon listing or Sandisk's support page for the warranty that applies to the SDSQXH9-128G-GZ6MA.
Key Features
- CAPTURE LARGER THAN LIFE. Unlock startling 5K[3] point-of-view and pristine high-res stills with video speed class ratings of U3 and V30[4].
- SPEED BARRIERS SHATTERED. Save precious moments with rapid read speeds up to 245MB/s[2] and write speeds up to 170MB/s[2] [256GB-1TB capacities[1]].
- MAXIMIZE WITH MASSIVE CAPACITY. Record longer and store more with up to 2TB[1] of storage.
- DURABILITY YOU CAN COUNT ON. SANDISK microSD cards are temperature proof, humidity proof, waterproof, shock proof, drop proof, magnet proof, X-ray proof and wear-out proof[7].
- EASY CONTENT MANAGEMENT. Easily back up, organize, and transfer your photos and videos with the SANDISK Memory Zone desktop or Android mobile app[10].
Full Specifications
| Size | 128GB |
|---|---|
| Brand | Sandisk |
| Color | Not Available |
| Model | SDSQXH9-128G-GZ6MA |
| Warranty | Lifetime Limited |
| UnitCount | 1 |
| ReleaseDate | 2026-03-04T00:00:01Z |
| Manufacturer | Sandisk Technologies, Inc. |
| ItemPartNumber | SDSQXH9-128G-GZ6MA |
Ready to buy?
SANDISK 128GB Extreme microSD Card + Adapter, Up to 245MB/s Read Speeds is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-06. Price and availability subject to change.
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