KOOTION TF-128G-KT906 128GB microSDXC UHS-I U3 V30 A1 Card

KOOTION TF-128G-KT906 is a 128 GB microSDXC card listing UHS-I, U3, V30 and A1 classifications. Its stated 90 MB/s read and 30 MB/s write speeds suit expandable storage for compatible phones, tablets and cameras, though actual transfer speeds depend on hardware and software.

At a glance

128 GB capacity for additional storage or file backups in compatible devices.
The listing states 90 MB/s read and 30 MB/s write speeds, with U3, V30 and A1 classifications.
The card is listed for cameras, smartphones and tablets, with wider application claims including game consoles, dash cameras and drones.
The card is said to be formatted as exFAT. The listing cautions that compatible device support may be needed.

Price

$25.49Save 15%

Reference price: ~~$29.99~~

Price checked: Nov 14, 2026

View offer Ahead of Black FridayExplore the selection

Often bought together

AKASO EK7000 4K30FPS 20MP WiFi Action Camera with EIS Ultra HD 131FT Waterproof Underwater Camera Remote Control 4X Zoom Support External Microphone Black

$69.99

Pros and cons

Pros

A 128 GB capacity offers room for photos, video, music and other files.
The stated U3 and V30 classes and write-speed claim are relevant to buyers considering video recording.
Small listed dimensions and a 1 g listed weight make the card easy to carry.

Technical specifications

15 specifications

Identity
Brand	KOOTION
Model	TF-128G-KT906
Card format	Micro SDXC
Connectivity	microSDXC
Color	White, Orange

Storage and compatibility
Storage capacity	128 GB
Compatible devices	Camera, Smartphone, Tablet
Listed format	exFAT

Speed and class
Read speed	90 megabytes_per_second
Media speed	30 megabytes_per_second
Speed class	Class 10
Video speed class	V30
Other listed classifications	U3, V30, A1

Dimensions and installation
Weight listed	1 g
Dimensions listed	0.59"L x 0.43"W

What to know before buying

Listing details to confirm

The speed claims are manufacturer/listing claims, and actual transfer speed may vary with hardware and software. The listing gives two different usable-capacity estimates, approximately 90% and approximately 93% of rated capacity. It also describes the media speed as 30 megabytes_per_second while separately stating a 30 MB/s write speed. Check the target device's microSDXC and exFAT support, and format the card if needed for compatibility.

Who is it for?

A good fit for

People adding removable storage to a compatible smartphone, tablet or camera.
Buyers seeking a 128 GB card with listed U3 and V30 classes for video recording.

Less suited to

Buyers who need guaranteed transfer speeds independent of their card reader or device.
Devices that do not support microSDXC or the card's exFAT format.

KOOTION TF-128G-KT906 128GB microSDXC UHS-I U3 V30 A1 Card · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 3,729 ratings

5 stars76%76%
4 stars11%11%
3 stars4%4%
2 stars2%2%
1 star7%7%

Aggregate ratings are mostly in the five-star category, but a smaller share of ratings are one-star, with the remaining ratings spread across other categories. Without customer-comment evidence, these figures do not explain the reasons behind ratings or establish specific strengths or defects. Buyers should assess the stated capacity, speed claims and device-format compatibility against their needs.

Frequently asked questions

Which devices is this card listed for?

The product details list cameras, smartphones and tablets. The feature text also names game consoles, dash cameras, drones and surveillance systems. Confirm the target device supports microSDXC.

What speeds does the listing claim?

It states 90 megabytes_per_second read speed and 30 megabytes_per_second media speed, and separately describes 30 MB/s write speed. Actual transfer speeds may vary with hardware and software.

What format does the card use?

The listing says it is formatted as exFAT and advises checking device compatibility. It says to format the card if the device does not support that format.

How much capacity is available for files?

The listing estimates usable capacity at both approximately 90% and approximately 93% of the rated capacity. These claims differ, so the exact available space is not established by the supplied details.