SanDisk Extreme 256GB microSDXC UHS-I Memory Card - SDSQXAV-256G-GN6MN

SanDisk Extreme 256GB microSDXC UHS-I Memory Card
The SanDisk Extreme 256GB, model SDSQXAV-256G-GN6MN, is a high-performance microSDXC memory card designed for demanding photo, video, mobile, action-camera, and drone applications.
With up to 190MB/s sequential read and 130MB/s sequential write performance, it provides fast media transfers and the sustained performance needed for compatible 4K UHD video recording and burst photography. Sandisk
256GB Storage Capacity
The 256GB capacity provides substantial storage for:
- 4K UHD and Full HD video
- High-resolution photos
- Action-camera footage
- Drone recordings
- Smartphone media
- Apps and large files
Actual usable capacity is lower after formatting and system usage.
Up to 190MB/s Read Speed
SanDisk rates this generation for sequential read speeds of up to:
190MB/s
It uses SanDisk QuickFlow Technology to help accelerate media transfers. Maximum advertised performance requires compatible hardware; SanDisk recommends a compatible high-speed reader to achieve the highest transfer rates. Sandisk
Up to 130MB/s Write Speed
The 256GB version supports sequential write speeds of up to:
130MB/s
This makes it suitable for fast-action photography and high-resolution video capture on compatible devices. SanDisk Documents
U3 & V30 Video Ratings
The card carries both:
UHS Speed Class 3 (U3)
Video Speed Class 30 (V30)
These ratings make it suitable for demanding video recording, including compatible 4K UHD workflows. Sandisk
A2 Application Performance
The SanDisk Extreme microSDXC is rated:
Application Performance Class A2
A2 is designed to improve application performance when the card is used as expandable storage in compatible Android devices. Sandisk
4K UHD Video Recording
SanDisk specifically positions the Extreme microSDXC UHS-I series for recording:
- 4K UHD video
- Full HD video
- High-resolution photography
Actual supported resolution, frame rate, and bitrate depend on the host device and recording format. Sandisk
Ideal for Action Cameras & Drones
The combination of compact size, high write performance, and V30/U3 ratings makes the card suitable for compatible:
- Action cameras
- Drones
- Smartphones
- Tablets
- Handheld devices
- Cameras with microSDXC support
SanDisk specifically identifies smartphones, action cameras, and drones among the intended applications. Sandisk
Built for Demanding Environments
SanDisk states that its Extreme microSDXC cards are designed to withstand challenging conditions, with resistance to:
- Water
- Shock
- X-rays
- Extreme temperatures
This provides additional protection for travel, outdoor recording, and action-camera use. Sandisk
Wide Operating Temperature Range
SanDisk specifies:
Operating temperature: -25°C to 85°C
Storage / non-operating temperature: -40°C to 85°C SanDisk Documents
Compact microSDXC Form Factor
The card measures approximately:
14.99 × 10.92 × 1.02mm
making it suitable for compact devices using a compatible microSDXC slot. SanDisk Documents
Key Features
- Brand: SanDisk
- Series: Extreme
- Model Number: SDSQXAV-256G-GN6MN
- Capacity: 256GB
- Form Factor: microSDXC
- Interface: UHS-I
- Maximum Read Speed: Up to 190MB/s
- Maximum Write Speed: Up to 130MB/s
- Speed Class: Class 10
- UHS Speed Class: U3
- Video Speed Class: V30
- Application Performance Class: A2
- 4K UHD Video Support: Yes, with compatible devices
- SanDisk QuickFlow Technology
- Waterproof
- Temperature resistant
- Shock resistant
- X-ray resistant
- Dimensions: 14.99 × 10.92 × 1.02mm
- Operating Temperature: -25°C to 85°C
- Non-Operating Temperature: -40°C to 85°C
- Warranty: Lifetime Limited Warranty in eligible regions Sandisk
Compatibility
Compatible with supported devices using:
- microSDXC
- microSDXC UHS-I
It can be used with compatible smartphones, tablets, action cameras, drones, cameras, handheld devices, and card readers.
For devices with a full-size SD slot, an appropriate microSD-to-SD adapter is required.

Ideal For
Action cameras, drones, Android smartphones, tablets, 4K UHD recording, Full HD recording, outdoor cameras, high-resolution photography, travel, content creation, and users needing fast portable storage.

Why Buy from QUTECH?
Genuine SanDisk products, competitive prices, fast delivery across Malé & Hulhumalé, ferry delivery available to other islands, and secure online shopping.