SanDisk SDSQUAR-400G-GN6MA

SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter

Model: SDSQUAR-400G-GN6MA

Product Overview

The SanDisk 400GB Ultra MicroSDXC UHS-I Memory Card with Adapter is designed for expanding storage in Android smartphones, tablets, and MIL cameras. It offers high capacity for storing Full HD video and features fast transfer speeds.

  • High Capacity: Up to 400GB (actual user storage less) for extensive Full HD video storage.
  • Fast Transfer Speeds: Up to 100MB/s read speed, allowing transfer of approximately 1000 photos in one minute. Write speed may be lower and performance can vary based on host device and usage conditions.
  • A1-Rated Performance: Optimized for faster app loading and performance on compatible devices. A1 performance is 1500 read IOPS, 500 write IOPS.
  • Full HD Video Ready: Class 10 speed rating supports Full HD (1920x1080) video recording and playback.
  • Durability: Designed to be temperature proof.
  • SanDisk Memory Zone App: Available for download and installation for easy file management.

What's in the Box

  • SanDisk Ultra MicroSDXC Card
  • SD Adapter

Setup

Inserting the MicroSD Card into a Device

Most compatible devices, such as smartphones, tablets, and cameras, have a dedicated slot for microSD cards. Locate this slot on your device. Gently push the microSD card into the slot until it clicks into place. Ensure the card is oriented correctly according to your device's instructions.

A person's hands inserting a SanDisk Ultra microSD card into the side slot of a black smartphone.

Image: A person is shown carefully inserting the SanDisk Ultra microSD card into the designated slot on a smartphone. This illustrates the physical installation process.

Using the SD Adapter

The included SD adapter allows you to use your microSD card with devices that accept standard SD cards, such as laptops or digital cameras. Insert the microSD card into the adapter until it locks. Then, insert the adapter into the SD card slot of your device.

Operating Instructions

Recording Full HD Video

With its Class 10 speed rating, the SanDisk Ultra microSD card is suitable for recording Full HD (1920x1080) video. Ensure your device's camera settings are configured for Full HD recording. The card's capacity allows for many hours of video storage.

Transferring Data

To transfer files to or from the card, connect your device (with the card inserted) to a computer, or use the SD adapter with a card reader. The card supports read speeds up to 100MB/s for quick data transfers.

App Performance (A1 Rating)

The A1 rating means the card is optimized for faster app loading and performance when used as adoptable storage in compatible Android devices. This improves the responsiveness of applications stored on the card.

Video: Official SanDisk video demonstrating the benefits of the Ultra microSD Memory Card, including storage capacity for Full HD video and faster app loading with A1 performance.

Maintenance

  • Proper Handling: Always handle the microSD card and adapter with care. Avoid touching the gold connector pins.
  • Temperature Resistance: The card is designed to be temperature proof, but extreme temperatures should still be avoided for optimal longevity.
  • Safe Removal: Always safely eject the card from your device or computer before physically removing it to prevent data corruption.
  • Regular Backups: Periodically back up important data from your memory card to another storage device to prevent data loss.

Troubleshooting

  • Card Not Detected: Ensure the card is fully and correctly inserted into the device or adapter. Try restarting your device.
  • Slow Performance: Performance can vary. Ensure your device supports the card's speed class. Avoid filling the card to its maximum capacity, as this can sometimes slow down performance.
  • Data Corruption: If files become corrupted, try formatting the card (this will erase all data). Always back up data before formatting.
  • Compatibility Issues: Verify that your device supports microSDXC cards and the specified capacity (400GB).
  • Contact Support: If issues persist, refer to the SanDisk support website or contact customer service.

Specifications

BrandSanDisk
Model NameSDSQUAR-400G-GN6MA
Flash Memory TypeMicro SDXC
Memory Storage Capacity400 GB
Compatible DevicesCamera, Smartphone, Tablet
Read Speed100 Megabytes Per Second
Write Speed[0.5-100] MB/s
Secure Digital Association Speed ClassClass 10
Hardware InterfacemicroSDXC
Special FeatureTemperature Proof
Item Weight0.16 ounces
Product Dimensions0.43"L x 0.59"W

Warranty and Support

This SanDisk product comes with a Limited Warranty. For specific terms and conditions, please refer to the warranty information provided with your product packaging or visit the official SanDisk support website.

For technical assistance, troubleshooting, or further inquiries, please visit the SanDisk support portal or contact their customer service directly.

© 2026 SanDisk. All rights reserved.

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