Basic 128GB MicroSDXC Flash Memory Card with Adapter 90MB/s Read 50MB/s Write
Quick take
This 128GB microSDXC card is built around UHS-I speed ratings, with up to 90MB/s read and a sustained 50MB/s minimum write, plus V30/U3/C10 and A1 app performance for faster phone or tablet app loads. It includes an SD adapter for easier use in laptops and cameras. The main caveat is compatibility, since some devices have limits on microSD format and capacity or expect specific speed requirements, so it’s worth checking before you buy.
Pros and cons
Pros
- UHS-I speed setup for HD recording and everyday file transfers (up to 90MB/s read, sustained 50MB/s write, V30/U3/C10).
- A1 app performance rating, helpful for phones and tablets that support it.
- Includes an SD adapter for use in devices with SD slots.
- Rated for harsh-condition resilience (waterproof, shock/temperature protection, X-ray and magnet proof).
Cons
- Best results depend on device support, some equipment may not accept all microSD cards or capacities.
- “Up to” read speeds are not the same as sustained real-world performance during heavy recording or continuous writes.
- Buyer review evidence in this sample is limited and doesn’t cover edge cases like long-term endurance or very high-bitrate recording beyond HD use.
What buyers think
Buyer feedback on this 128GB microSDXC card is generally positive and focused on basic functionality. Multiple reviewers describe it as working as expected for home cameras and motion detection setups, and one notes that it matched the advertised capacity. Overall, the available review snippets suggest it’s a dependable storage option for everyday use cases like camera recording and general file needs, with the key practical reminder being to confirm compatibility with the specific device you plan to use.
Key features that matter for real use
Speed ratings for HD video, dashcams, and security cameras
The card targets consistent recording performance rather than only burst speed. It’s rated with UHS-I Class 10 (C10), U3, and V30 (Video Speed Class), plus a sustained 50MB/s minimum write. That combination is geared toward stable performance for HD Full HD video recording, and it’s also relevant for devices that continuously write footage such as dashcams and security cameras.
Up to 90MB/s read, plus A1 app performance
You get up to 90MB/s read speed for faster transfers when moving files to a computer or when quickly pulling data off the card. The A1 app performance rating is designed to help with random-read workloads, which can support smoother app behavior on devices that allow app storage to be expanded onto supported microSD cards.
Includes an SD adapter for flexibility
If you need to use the card in a device with an SD slot, the included adapter makes it more versatile. This is especially handy if you regularly transfer photos or footage using an SD card reader.
Durability-focused protection claims
The card is marketed as waterproof, shockproof, temperature-proof, X-ray-proof, and magnet-proof. That’s a plus if you’re using it in outdoor, on-the-go, or high-vibration environments where accidental exposure is more likely.
Storage capacity and the “why it looks smaller” issue
Because manufacturers and operating systems may display storage differently, the usable space can appear smaller than the labeled capacity. This is a normal industry practice and does not necessarily reflect slower performance.
Who this microSD card is best for
- Dashcam and home security camera owners who want a 128GB microSDXC card with V30/U3/C10 and a sustained write rating.
- Phone and tablet users looking for A1 app performance support (only if your device supports microSD app storage).
- Casual photographers and file movers who want a card that transfers quickly and also works with an SD adapter for computers and cameras.
- Buyers who value durability and want a card positioned for tougher day-to-day environments.
Who should avoid it or double-check first
- Anyone with strict microSD compatibility limits (format support, capacity caps, or minimum speed requirements). Always verify your device accepts microSDXC up to this capacity and meets the recording needs.
- High-bitrate recording setups where the device’s requirements are more demanding than standard HD. If your system expects higher sustained write behavior than the card provides, you may want to prioritize a better-suited option.
- Buyers who only care about maximum real-time copy speeds and never record continuously. In those cases, focusing purely on peak read figures may not reflect what you actually experience.
Pros and cons recap
- Good fit: HD-focused dashcams, security cameras, and everyday phone storage needs, with ratings that support sustained writes.
- Main tradeoff: performance depends on device compatibility, and peak “up to” speeds are not the same as sustained behavior during heavy use.
Price and availability
Pricing and stock can change quickly. Check the latest availability before buying, especially since this listing may have limited units at times.
Simple buying checklist before you click “buy”
- Confirm microSD format support: make sure your device supports microSDXC.
- Match recording needs: for dashcams and security cameras, look for a card with a video-oriented speed rating (like V30) and sufficient sustained write.
- Verify capacity limits: some older devices only support certain maximum capacities.
- Consider your workflow: if you frequently transfer files to an SD reader, the included adapter helps.
FAQs
Is this microSD card good for dashcams and security cameras?
It’s designed for video recording use, with U3 and V30 ratings plus a sustained 50MB/s minimum write. That makes it a reasonable choice for HD-focused dashcams and home security camera setups, as long as your specific device supports microSDXC and meets its speed and capacity requirements.
What do the speed numbers actually mean for everyday use?
“Up to” read speeds (up to 90MB/s) are typically most relevant when transferring files, such as copying footage to a computer. The sustained write rating (50MB/s minimum) is more important for continuous recording, where the card needs to keep up over time.
Does it come with an SD adapter?
Yes, the card includes an SD adapter, so you can use it in devices that accept standard SD cards (like some cameras or card readers).
Will it work in my phone or tablet?
It should work in devices that support microSDXC cards. If you want to store apps, look for support for A1 app performance on your phone or tablet, since not all devices allow apps on external storage.
Why does my device show less than 128GB?
Usable capacity can appear smaller than the labeled size due to how storage is measured and how operating systems report it. This is normal and typically does not mean the card is defective.
What’s the biggest reason this type of card might not work for someone?
Compatibility. Some devices have limits on maximum capacity, require specific microSD formats, or need a certain level of speed for reliable recording. Checking those requirements first is the best way to avoid problems.
Specifications
| Product Title | Basic 128GB MicroSDXC Flash Memory Card with Adapter 90MB/s Read 50MB/s Write UHS-I C10 U3 V30 A1 Rated for Dashcams Security Cameras Tablets Phones Drone Console (1 Pack) |
|---|---|
| Category | Electronics > Computers & Accessories > Computer Accessories & Peripherals > Memory Cards > Micro SD Cards |
| Brand | Teknostone |
| Manufacturer | Teknostone |
| Model Name | TeknoBasic128 |
| Model Number | TeknoBasic128 |
| Color | Black |
| Flash Memory Type | Micro SDXC |
| Memory Storage Capacity | 128 GB |
| Compatible Devices | smartphones, tablets, dashcams, drones, security cameras, action cameras, Nintendo Switch, laptops |
| Additional Features | Magnetic Proof, Temperature Proof, Water Proof, Wearout Proof, X Ray Proof |
| Read Speed | 90 Megabytes Per Second |
| Media Speed | 50 megabytes_per_second |
| Hardware Connectivity | microSDXC |
| Secure Digital Association Speed Class | Class 10 |
| Flash Memory Video Speed Class | V30 |
| Unit Count | 1.0 Count |
Available variants
Capacity
- 256GB
- 128GB 2 Packs
- 128GB
- 64GB
- 64GB 3 Packs
Style
- Gaming Series
- Basic Series
- Camera Series
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