Introduction
Thank you for choosing the KOOTION 128GB Micro SD Card 2-Pack. This high-performance UHS-I microSDXC Flash Memory Card is designed to expand the storage capacity of your compatible devices, enabling seamless Full HD video recording and rapid data transfer. This manual provides essential information on setup, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your memory cards.
Product Features
- Expanded Storage: Each 128GB micro SD card provides significant additional capacity for your devices, helping to free up internal storage and improve device performance.
- Full HD Video Recording: With U1 and Speed Class 10 (C10) ratings, these cards are optimized for smooth and uninterrupted recording of Full HD 1080P and 720P videos, capturing your important moments with clarity.
- Universal Compatibility: Widely compatible with a variety of devices including smartphones, tablets, PCs, laptops, security cameras, action cameras, drones, dashcams, and game consoles. An included SD adapter further extends versatility for devices with standard SD card slots.
- Fast Data Transfer: Leveraging UHS-I technology, the microSDXC cards offer read speeds of up to 90MB/s, facilitating quick and efficient transfer of high-resolution photos, music, applications, games, videos, and large files.
- Enhanced Durability: Constructed with high-quality chips, these TF flash memory cards are designed to be water-resistant, anti-magnetic, shockproof, and resistant to extreme high or low temperatures, ensuring your data remains safe and secure.
Setup and Installation
Follow these steps to properly install and prepare your KOOTION Micro SD Card for use:
- Identify the Slot: Locate the microSD card slot on your device (e.g., smartphone, camera, drone). If your device uses a standard SD card slot, insert the microSD card into the provided SD adapter first.
- Insert the Card: Gently insert the microSD card (or adapter with microSD card) into the designated slot. Ensure it is inserted in the correct orientation to avoid damage. You may hear a click when it is properly seated.
- Initial Formatting: For optimal performance and compatibility, it is recommended to format the new microSD card using your device's internal formatting function. This process will erase all data on the card, so ensure it is empty or backed up before proceeding. The card is pre-formatted as exFAT by default.
- Verify Capacity: After formatting, check your device's storage settings to confirm that the card is recognized and displays the correct available capacity. Note that actual usable capacity will be slightly less than the advertised 128GB due to system files and formatting.

Figure 1: Steps for inserting the microSD card into the adapter and then into a computer's card reader for data transfer.
Operating Instructions
Once installed, your KOOTION Micro SD Card is ready for use. Here are common operations:
- Saving Photos and Videos: Set your camera, smartphone, or action camera to save media directly to the microSD card. The Class 10 and U1 speed ratings ensure reliable performance for Full HD video recording and high-resolution photo capture.
- Data Transfer: To transfer files to or from the card, insert it into a compatible card reader (or the provided SD adapter and then an SD card reader) connected to a computer. Drag and drop files as you would with any other storage device.
- Using with Drones/Dashcams: For devices like drones and dashcams, ensure the card is properly inserted before operation. The card's speed and capacity are suitable for continuous recording in these applications.
- Application Storage: On compatible smartphones and tablets, you can configure applications to install or store data directly on the microSD card, freeing up internal device memory.

Figure 2: The KOOTION Micro SD card supports fast read speeds up to 90MB/s, ideal for capturing life on the move with various devices.
Specifications
| Attribute | Detail |
|---|---|
| Brand | KOOTION |
| Model Name | TF-U1-128GX2-IN F |
| Memory Storage Capacity | 128 GB |
| Flash Memory Type | Micro SDXC |
| Hardware Interface | microSDXC |
| Secure Digital Association Speed Class | Class 10 |
| Read Speed | Up to 90 MB/s |
| Write Speed | 10 MB/s |
| Special Features | Drop Proof, Magnetic Proof, Water Proof, X-Ray Proof |
| Compatible Devices | Smartphones, Tablets, PCs, Laptops, Security Cameras, Action Cameras, Drones, Dashcams, Game Consoles |
| Product Dimensions | 0.59 x 0.43 x 0.04 inches |
Maintenance and Care
To ensure the longevity and reliability of your KOOTION Micro SD Cards, observe the following guidelines:
- Handle with Care: Avoid bending, dropping, or applying excessive force to the card.
- Keep Clean: Periodically clean the metal contacts of the card with a soft, dry, lint-free cloth. Avoid touching the contacts directly with your fingers.
- Environmental Protection: While the cards are designed to be water-resistant, shockproof, and temperature-resistant, prolonged exposure to extreme conditions should be avoided. Store cards in a cool, dry place away from direct sunlight and strong magnetic fields.
- Safe Removal: Always safely eject the card from your device or computer before physically removing it to prevent data corruption.
- Regular Backups: Regularly back up important data from your memory card to another storage device (e.g., computer hard drive, cloud storage) to prevent data loss.

Figure 3: The KOOTION Micro SD card offers 6-proof protections against water, shock, wear, high temperatures, magnets, and X-rays.
Troubleshooting
If you encounter issues with your KOOTION Micro SD Card, try the following solutions:
- Card Not Recognized:
- Ensure the card is fully and correctly inserted into the device or adapter.
- Try inserting the card into a different compatible device or card reader to rule out a device-specific issue.
- Clean the metal contacts of the card.
- Data Corruption/Errors:
- Perform a full format of the card using your device's utility or a computer. (Warning: This will erase all data.)
- Ensure the card is always safely ejected before removal.
- Slow Performance:
- Ensure your device supports UHS-I speeds.
- Check if the card is nearly full; performance can degrade with very little free space.
- Avoid running multiple demanding applications simultaneously when recording or transferring data.
- Actual Capacity Less Than Advertised: This is normal. A portion of the listed capacity is used for formatting and other functions, resulting in slightly less usable storage space.
Warranty and Support
Your KOOTION Micro SD Card comes with a Limited Warranty. For specific terms and conditions, please refer to the product packaging or contact KOOTION customer support. If you require further assistance or have questions not covered in this manual, please visit the official KOOTION website or contact their customer service team for support.
For additional information and support, you may visit the KOOTION Store on Amazon.
Visual Guide and Product Videos
Product Images

Image 1: The KOOTION 128GB Micro SD Card shown alongside its included standard SD adapter.

Image 2: Illustrates the use of the SD card adapter with a DSLR camera, allowing the microSD card to be used in devices with larger SD slots.
Official Product Videos
Video 1: Official KOOTION video showcasing the Class 10 Micro SD Flash Memory Cards (U1 C10) and their features.
Video 2: A review highlighting the performance and value of KOOTION 128GB Micro SD Cards.