128GB Micro SD Card Class 10 V30 U3 A2 – Fast Flash Storage

amzwn 128GB Micro SD / TF Card – Class 10, V30, U3, A2

Expand your storage instantly with the amzwn Micro TF/SD Flash Card. Available in 32GB, 64GB, 128GB, and 256GB capacities, this high-speed memory card is engineered for demanding workloads — from 4K video recording on action cameras and dash cams to fast file transfers on smartphones, tablets, and laptops. Simply plug it in — no software installation required.

Key Features

• Class 10 / U3 / V30 / A2: Write speeds of 30–80 MB/s; read speeds of 40–129 MB/s — handles 4K video with ease.
• Wide Compatibility: Works with smartphones, tablets, notebooks, cameras, dash cams, drones (UAVs), smart speakers, digital devices, monitoring systems, and more.
• Plug & Play: No drivers or software needed — just insert and go.
• H2testw Verified: Supports H2testw integrity testing so you can confirm card health and authenticity.
• Reliable Temperature Range: Operating: 0°C to 60°C | Storage: -20°C to 85°C.
• Made in Mainland China.

Specifications

Capacity Note

Flash memory manufacturers calculate capacity using decimal math (1 GB = 1,000,000,000 bytes), while your operating system uses binary math (1 GB = 1,073,741,824 bytes). As a result, the displayed capacity on your device may appear slightly lower than the labeled size. This is normal and not a defect.

• 32 GB ≈ approximately 27–31 GB usable (Format: FAT32)
• 64 GB ≈ approximately 58–62 GB usable (Format: exFAT)
• 128 GB ≈ approximately 95–122 GB usable (Format: exFAT)
• 256 GB ≈ approximately 210–238 GB usable (Format: exFAT)

Important: Check Your Device's Supported Capacity

Before purchasing, confirm that your device supports the capacity you are ordering. If your device only supports up to a certain capacity (e.g., 4 GB), inserting a higher-capacity card may prevent it from functioning properly. This is a device compatibility limitation, not a product quality issue.

What's in the Box

• 1 × Micro SD / TF Memory Card
• 1 × Retail Packaging

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Frequently Asked Questions

Q: Is this Micro SD card compatible with my smartphone and camera?

A: Yes — the amzwn Micro SD card is compatible with a wide range of devices including Android smartphones, tablets, DSLR and action cameras, dash cams, drones, laptops, MP3/MP4 players, and smart speakers. Always verify your device supports the capacity you select before purchasing.

Q: What does Class 10, U3, V30, and A2 mean for this memory card?

A: These are speed and performance ratings. Class 10 guarantees a minimum sequential write speed of 10 MB/s. U3 ensures at least 30 MB/s write speed for UHS-I devices. V30 (Video Speed Class 30) confirms sustained 30 MB/s write performance ideal for 4K video recording. A2 denotes fast random read/write performance for running apps directly from the card — great for smartphones and tablets.

Q: What format should I use when formatting this SD card?

A: For 32 GB cards, use FAT32 format. For 64 GB, 128 GB, and 256 GB cards, use exFAT format. Most modern devices will handle formatting automatically, or you can format via your computer's disk management utility.

Q: How can I verify that the Micro SD card's capacity is genuine?

A: This card supports H2testw testing — a free tool that writes and reads test data to verify the true available capacity. A damaged sector area of less than 4% is considered normal and within acceptable limits for this card.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.