SanDisk Extreme microSD Card 128GB
- 128 GB microSDXC
- 190 MB/s read, 90 MB/s write
- V30 video speed, Class 10
- 4K UHD video recording
- A2 rated for app performance
- Limited warranty
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A fast microSD card for 4K recording on phones, action cameras and drones. It is a bare microSDXC card with no reader included, and the listing gives two different write speeds.
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ASIN: B0B2DD66GSCategory: MicroSD Cards
Sizes Available
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Overview
Inside an action camera, a drone or an Android phone, this microSDXC card stores 4K UHD video and full HD footage. It is a portable memory card, not a drive, and it is read through a device or a separate reader.
Fast sequential reads and a V30 rating cover 4K capture and quick file transfers to a computer. The listing says the professional reader that reaches top speed is sold separately, and the description quotes a write speed that differs from the spec table.
Who it's for
Phone users, action camera shooters and drone pilots get headroom for long 4K clips. Buyers who need a card reader in the box, or a confirmed write speed for professional work, should read the listing again.
Pros and cons
- V30 rating for sustained video recording
- Handles 4K UHD video capture
- A2 rating for app performance
- Small and light
- Write speed differs between spec and description
- Card reader sold separately
- SD adapter not mentioned
Performance notes
Read speed governs how fast files move to a computer, while the V30 rating and write speed decide whether a 4K video stream records without drops. The A2 rating adds quick app loading when the card holds apps on a phone. A matching reader is needed to reach the quoted transfer speed.
Specifications
| Brand | SanDisk |
|---|---|
| Dimensions & fit | |
| Weight | 5 g |
| Capacity & performance | |
| Memory Storage Capacity | 128 GB |
| Flash Memory Video Speed Class | V30 |
| Secure Digital Association Speed Class | Class 10 |
| Media Speed | 90 MB per second |
| Read Speed | 190 megabytes per second |
| Construction & materials | |
| Color | Red/Gold |
| Compatibility & installation | |
| Hardware Connectivity | microSDXC |
| Compatible Devices | Camera, Personal Computer |
| Included components | |
| Number of Packs | 1 |
| Warranty & support | |
| Warranty Type | Limited |
| Other details | |
| Flash Memory Type | Micro SD |
| Additional Features | Portable |
Closest rivals on specs
Patriot V30 A1 microSD Card 64GB- Memory Storage Capacity 128 vs 64 GB (+100%)
Patriot LX Series microSD Card 32GB- Memory Storage Capacity 128 vs 32 GB (+300%)
GIGASTONE 4K microSDXC Card 128GB- Item Weight 0.01 vs 0.04 pounds (-75%)
Frequently asked questions
Is the SanDisk Extreme microSD a full-size SD card?
No. It is a microSDXC card. The listing does not mention an SD adapter, and the professional reader is sold separately.
Is the SanDisk Extreme 128GB microSD good for 4K video?
Yes. The listing says it handles 4K UHD recording, and it carries a V30 video speed class.
Why do the write speeds differ in the SanDisk Extreme listing?
The spec table says 90 MB per second, while the description quotes up to 130 MB per second. Treat 90 MB/s as the safer figure.