1. Introduction
The SSK USB 3.2 Gen 2 Solid State Flash Drive (Model SD300) offers ultra-high-speed data transfer, robust durability, and wide compatibility. Designed for efficient storage and quick access to large files, it's an ideal solution for professionals and everyday users alike.
This manual provides essential information for setting up, operating, maintaining, and troubleshooting your SSK SD300 flash drive.

2. Setup and Initial Use
The SSK SD300 flash drive is designed for plug-and-play functionality, requiring no special drivers for most operating systems.
2.1 Connecting to a USB-A Port
- Locate an available USB-A port on your computer, smart TV, car audio system, or other compatible device.
- Remove the protective cap from the flash drive.
- Insert the USB-A connector of the flash drive firmly into the USB-A port.
- The device should automatically detect the flash drive. For computers, it will appear as a removable drive.

2.2 Connecting to a USB-C Port (with adapter)
The SSK SD300 comes with a Type-C adapter for extended compatibility.
- Attach the provided Type-C adapter to the USB-A connector of the flash drive.
- Locate an available USB-C port on your smartphone (ensure OTG function is supported), tablet, MacBook, or other compatible device.
- Insert the Type-C adapter firmly into the USB-C port.
- Your device should detect the flash drive. For smartphones, you may need to access it through a file manager application.


3. Operating Instructions
3.1 File Transfer
Once connected, you can transfer files to and from the SSK SD300 just like any other external storage device.
- To copy files to the drive: Drag and drop files from your computer's folders to the flash drive's folder, or use the 'Copy' and 'Paste' functions.
- To copy files from the drive: Drag and drop files from the flash drive's folder to your computer's folders, or use the 'Copy' and 'Paste' functions.
The drive supports ultra-fast transfer speeds of up to 550MB/s read and 520MB/s write, ensuring quick movement of large-capacity files and photos. This speed is maintained even during prolonged transfers.


3.2 Safe Removal
Always safely remove the flash drive from your device to prevent data corruption.
- Windows: Right-click the drive icon in 'This PC' or the taskbar, then select 'Eject'.
- macOS: Drag the drive icon to the Trash, or click the 'Eject' button next to the drive in Finder.
- Smartphones/Tablets: Look for an 'Eject' or 'Unmount' option in your device's notifications or file manager.
4. Maintenance and Care
The SSK SD300 is built with durability in mind, but proper care will ensure its longevity and data integrity.
- Physical Protection: The drive is made of high-grade zinc alloy, resistant to falling and abrasion. The flip-up cap design protects the USB interface.
- Environmental Protection: It features waterproof and dustproof functions, providing enhanced protection for your data.
- Heat Dissipation: The solid-state design and material provide excellent heat dissipation performance, even during intensive use.
- Storage: When not in use, keep the cap closed to protect the connector. Store the drive in a cool, dry place away from extreme temperatures and direct sunlight.


5. Troubleshooting
If you encounter issues with your SSK SD300 flash drive, try the following steps:
- Drive not detected:
- Ensure the drive is fully inserted into the USB port.
- Try a different USB port on your device.
- Try connecting to a different computer or device to rule out a port issue.
- If using the Type-C adapter, ensure it is securely connected to both the flash drive and the device.
- For smartphones, verify that the OTG function is enabled in your device settings, if applicable.
- Slow transfer speeds:
- Ensure you are connected to a USB 3.0 or USB 3.2 port for optimal performance. Connecting to a USB 2.0 port will result in slower speeds.
- Check if other applications or processes are heavily utilizing your system resources.
- The speed does not drop during transmission under normal conditions, but performance can vary slightly due to host equipment, interfaces, and usage conditions.
- Cannot write files:
- Check if the drive is full.
- Ensure the files you are trying to write are not read-only.
- Verify that you have the necessary permissions to write to the drive.
- The drive might be formatted with a file system that is read-only on your operating system (e.g., NTFS on macOS without additional software). Consider reformatting if necessary (this will erase all data).
- Data corruption:
- Always safely eject the drive before removing it. Unplugging it directly can lead to data corruption.
- Avoid exposing the drive to extreme physical shock or electromagnetic interference.
6. Specifications
| Feature | Description |
|---|---|
| Model Number | SD300 |
| Brand Name | SSK |
| Interface Type | USB 3.0 (Backward compatible with USB 2.0) |
| Standard | USB 3.0 (Note: Product description states USB 3.2 Gen 2 for speed, but interface type is listed as USB 3.0. Actual performance aligns with USB 3.2 Gen 2.) |
| Read Speed | Up to 550MB/s |
| Write Speed | Up to 520MB/s |
| Capacities Available | 128GB, 256GB, 512GB, 1TB, 2TB |
| Material | High-grade Zinc Alloy |
| Durability Features | Waterproof, Dustproof, Shock Resistance, Abrasion Resistance |
| Connector Protection | Flip-up cap design |
| Compatibility | USB-A devices (PC, Smart TV, Mac, Car Audio), USB-C devices (Smartphones with OTG, Tablets, MacBooks) |
| Certification | CE |

7. Warranty and Support
7.1 Warranty Information
The SSK USB 3.2 Gen 2 Solid State Flash Drive comes with a 5-year long warranty. Please retain your proof of purchase for warranty claims.
7.2 Customer Support
For technical assistance or warranty inquiries, please contact SSK customer support through the retailer or manufacturer's official website.
8. User Tips
- For maximum transfer speed, always use a USB 3.2 Gen 2 compatible port on your device. If your device only has USB 3.0 or 2.0 ports, the drive will still function but at reduced speeds.
- When connecting to a smartphone, ensure your phone supports USB On-The-Go (OTG) functionality for external storage.
- Keep the flip-up cap closed when the drive is not in use to protect the connector from dust and physical damage.
- Regularly back up important data stored on the drive to another location to prevent data loss from unforeseen circumstances.





