Sandisk

SANDISK 256B Extreme microSD Card + Adapter, Up to 245MB/s Read Speeds

Name: SANDISK 256B Extreme microSD Card + Adapter, Up to 245MB/s Read Speeds
Brand: Sandisk
SKU: B0G8M2FH2G
Price: 74.99 USD
Availability: InStock

By Mike Perry, Hardware Editor · Verified 2026-09-23

Mike Perry has researched PC hardware since 2014, tracking 80+ GPU generations, 50+ retro handheld platforms, and 30+ vintage PC configurations. He synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. View full credentials →

$74.99

As an Amazon Associate, SpecPicks earns from qualifying purchases.

View Current Price on Amazon → Compare to similar external storage

*Price sourced from Amazon.com. Last updated 2026-09-22. Price and availability subject to change.

Bottom line: The SANDISK 256B Extreme microSD Card + Adapter, Up to 245MB/s Read Speeds is a specs-and-price decision rather than a crowd-consensus one in the external storage category, priced around $74.99. Check the specification table above against one or two close alternatives — on price and spec fit, not on star ratings.

Pros & Cons

Pros

✓ MAXIMIZE WITH MASSIVE CAPACITY. Record longer and store more with up to 2TB[1] of storage.
✓ Backed by Sandisk's warranty and support channels
✓ Ships via Amazon with Prime eligibility and the standard returns policy

Cons

✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified

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 256B Extreme microSD Card + Adapter, Up to 245MB/s Read Speeds using a rating × review-volume × price-fit model applied to our editorial and benchmark analysis 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 Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.

Frequently Asked Questions

How fast is the SanDisk Extreme 256GB microSD card?

SanDisk rates it at up to 245MB/s read and up to 170MB/s write, and those figures apply to the 256GB through 1TB capacities.

Can it record 4K video?

Yes. It carries U3 and V30 video speed class ratings and is rated for 5.3K and 4K UHD capture, which are the classes action cams and drones require for sustained 4K recording.

Will this work in a GoPro or a drone?

It is marketed for action cams, drones, and Android devices, and its U3/V30 ratings match what those devices specify. Check your camera's supported card list for capacity limits.

Is it waterproof and durable enough for outdoor use?

SanDisk lists it as temperature proof, humidity proof, waterproof, shock proof, drop proof, magnet proof, X-ray proof, and wear-out proof.

What warranty does this card come with?

Warranty terms are not listed in the product details here. Check the current product listing or SanDisk's site for the warranty that applies to your region.

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	256GB
Brand	Sandisk
Color	Not Available
Model	SDSQXH9-256G-GZ6MA
Warranty	Lifetime Limited
UnitCount	1
ReleaseDate	2026-03-04T00:00:01Z
Manufacturer	Sandisk Technologies, Inc.
ItemPartNumber	SDSQXH9-256G-GZ6MA

Ready to buy?

SANDISK 256B Extreme microSD Card + Adapter, Up to 245MB/s Read Speeds is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

View Current Price on Amazon →

*Price sourced from Amazon.com. Last updated 2026-09-22. Price and availability subject to change.