SP Silicon Power

Silicon Power 128GB microSDXC

Name: Silicon Power 128GB microSDXC
Brand: SP Silicon Power
SKU: B09TQS634Y
Price: 23.97 USD
Availability: InStock
Rating: 4.6 (12143 reviews)

$23.97$24.994% off

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SP128GBSTXDU3V20ABStandard128 GB 5-year limited manufacturer warranty

Memory Cards

Expert Review Analysis

The Silicon Power 128GB Micro SD Card offers high‑speed UHS‑I performance with up to 100 MB/s read and up to 80 MB/s write (standard models 20 MB/s), rugged durability, and A1/A2 app support, making it a budget‑friendly option for 4K video, gaming, and mobile storage.

Pros

✓High read speed of 100 MB/s for quick file transfers
✓U3/V30 rating guarantees 30 MB/s minimum write for 4K video
✓A1/A2 support enables fast app loading on Android and Nintendo Switch
✓Industrial‑grade durability (waterproof, shockproof, temperature‑proof, X‑ray proof, drop‑proof)
✓Includes SD adapter for broader device compatibility
✓5‑year limited manufacturer warranty

Cons

Price History

Current

$23.97

Average

$10.74

Lowest

$8.52

Highest

$23.97

Price trend (90d):+71.3%

Best Seller Rank History

Now#16Best#7Worst#1,228 +10

Lower = better sales rank

Specifications

Accessories

Included SD AdapterYes

Compatibility

Compatible DevicesSmartphones, tablets, drones, Android tablets, tablet PCs, action cameras, DSLR, 4K/Full HD camcorder, Nintendo Switch

Not Compatible with Switch2Yes (not compatible)

Dimensions

Length15 mm mm

Width11 mm mm

Thickness1 mm mm

Product Details

ModelSP128GBSTXDU3V20AB

ColorStandard

Size128 GB

Warranty5-year limited manufacturer warranty

CategoryPersonal Computer

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User Reviews

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4.6

(12,143 reviews)

✗

Base models limited to 20 MB/s write speed, which can bottleneck high‑bitrate 4K recording

✗Not all variants are compatible with Nintendo Switch 2

✗Occasional reports of mislabeled or counterfeit cards from third‑party sellers

✗Real‑world write speeds sometimes slower than advertised

✗Isolated failures after months of use, though warranty service is responsive

From Expert Reviews

Praised by Experts

✓Budget‑friendly alternative to premium brands like SanDisk and Samsung
✓Superior Pro variant offers excellent value with up to 80 MB/s write speed for 4K video on drones and action cameras
✓A2 variant delivers noticeably faster app launches and smoother multitasking on Android devices
✓Performance rivals more expensive cards in real‑world tests

From User Reviews

Users Love

✓Excellent value for money with consistent performance
✓Reliable for 4K video recording and gaming on Nintendo Switch
✓Strong durability; survives water, drops, and extreme temperatures
✓Fast app and game load times, especially the A2 variant
✓Includes SD adapter for use in cameras, laptops, etc.
✓High user satisfaction and long‑term reliability

Users Complain About

✗Lower write speed (20 MB/s) on standard U3 model may limit 4K recording
✗Some variants not compatible with Nintendo Switch 2
✗Mislabeled or counterfeit cards reported from third‑party sellers
✗

Best For

Gamers (especially Nintendo Switch owners), content creators recording 4K video with drones or action cameras, travelers and outdoor enthusiasts needing a rugged card, and smartphone/tablet users who want fast app performance and expandable storage on a budget.

Not Ideal For

Professionals requiring the highest read speeds (>150 MB/s) for rapid bulk transfers, users of Nintendo Switch 2 who need guaranteed compatibility, and those who demand a lifetime warranty or the absolute fastest burst shooting performance.

Expert Opinion

Professional reviewers position the Silicon Power 128GB as a cost‑effective challenger that delivers near‑premium performance. The Superior Pro UHS‑I version is praised for its 80 MB/s write speed, making it suitable for 4K video on drones and action cams, while the A2 variant is highlighted for its superior app performance on Android and Nintendo Switch devices. Overall, experts see it as a solid budget choice that competes well against higher‑priced alternatives.

What Users Say

Everyday users consistently rate the card 4.5+ stars, lauding its fast load times on the Nintendo Switch, rugged build that survives rain and heat, and reliable 4K video capture without dropped frames. The most common complaints revolve around occasional mislabeled units, slower-than‑advertised write speeds on some devices, and rare premature failures, though warranty support is generally praised.

Common Complaints

Mislabeled or counterfeit cards from third‑party sellers, real‑world write speeds falling short of advertised figures, occasional sudden failures after several months of use, and incompatibility with Nintendo Switch 2 for certain models.

What People Are Saying

“Works perfectly with my Nintendo Switch — loads games fast and no lag.”
5/5 ★AmazonOct 2025

“Used it for 6 months on my drone — survived rain and extreme heat.”
4/5 ★B&H Photo VideoSep 2025

“Great for 4K video on my Sony camcorder — no dropped frames.”
5/5 ★AmazonNov 2025

“Card worked fine for months, but suddenly failed — though warranty replacement was quick.”
3/5 ★AmazonDec 2025

How It Compares

vs. SanDisk Extreme 128GB

Advantages

✓Higher max read speed (170 MB/s) for faster bulk transfers
✓Slightly higher max write speed (90 MB/s) for demanding 4K workflows

Disadvantages

✗Higher price point
✗Warranty limited lifetime but may involve stricter claim process

Choose SanDisk if you need the fastest read speeds and are willing to pay a premium.

vs. Samsung EVO Select 128GB

Advantages

✓Higher max read speed (130 MB/s)
✓

Rating Trend

Rating4.6/ 5Reviews12,232+1,126 reviews

Length with Adapter32 mm mm

Width with Adapter24 mm mm

Thickness with Adapter2.1 mm mm

Durability

WaterproofYes

ShockproofYes

Temperature-proofYes

X-ray proofYes

Drop-proofYes

Endurance

Insertions Rated10,000 insertions

General

BrandSilicon Power

Model NumberSP128GBSTXDU3V20AB

Part NumberSP128GBSTXDU3V20AB

Warranty5-year limited manufacturer warranty years

Performance

Bus InterfaceUHS-I

UHS Speed ClassU3 (minimum 30 MB/s) MB/s

Video Speed ClassV30 (minimum 30 MB/s) MB/s

Application Performance ClassA1 (minimum 1,500 IOPS read, 500 IOPS write)

Maximum Read Speed100 MB/s MB/s

Maximum Write Speed (Standard U3)20 MB/s MB/s

Maximum Write Speed (Superior Pro/A2)80 MB/s MB/s

Storage

Capacity128 GB GB

Card TypemicroSDXC

Temperature

Operating Temperature Range0°C to 70°C

Storage Temperature Range-40°C to 85°C

Weight

Weight (microSD)9 grams grams

Weight with Adapter5 grams grams

Capacity

Storage Capacity128 GB (usable slightly less after formatting)

Form Factor

Card TypemicroSDXC

Interface

Bus InterfaceUHS‑I (Ultra High Speed Phase I)

Warranty

Warranty5‑year limited manufacturer warranty

Model Numbers

Standard U3/A1SP128GBSTXDU3V20AB

A2 VariantSP128GBSTXDA2V20SP

Superior ProSU128GBSTXDU3V20BH

Included Accessories

SD AdapterIncluded for compatibility with standard SD slots

Dimensions & Weight

Height0.1 inches

Width0.43 inches

Depth0.59 inches

Weight0.02 Pounds

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Write speeds slower than advertised on older devices

✗Occasional sudden card failure after months of use

10‑year warranty

Disadvantages

✗Similar write speed (80 MB/s) but at a higher cost
✗No explicit A2 performance claim in the data

Samsung is a good middle ground for speed and warranty, but Silicon Power offers better value for budget‑focused users.

vs. Lexar 1000x 128GB

Advantages

✓Fastest max read speed (150 MB/s) and write speed (100 MB/s)
✓Lifetime warranty

Disadvantages

✗Premium pricing
✗Durability features comparable but not emphasized

Lexar is best for users who need top‑tier performance and are less price‑sensitive.