How to Securely Insert and Use an SD Card in Players (SU3 / SU5 / SU7 / SU9)

Supported SD Card Specifications:

• Type: microSD, microSDHC, microSDXC
• Maximum capacity: Up to 1TB (for all SU series models)
• File system: FAT32 or exFAT (NTFS is not supported). Cards above 32GB are typically pre-formatted as exFAT.

Step-by-Step Insertion:

1. Locate the SD card slot on the side or bottom edge of your SU player. There may be a rubber dust cover.
2. Hold the microSD card with the gold contacts oriented as shown in the user manual illustration.
3. Gently push the card into the slot until you feel slight resistance.
4. Push further until you hear a distinct "click" – this means the spring-loaded mechanism has locked the card in place. The card should sit flush with the device edge (not protruding).
5. Verify detection: Go to Settings → Storage → Look for "SD card" or "External storage". The total capacity (up to 1TB) should appear.

If You Don't Hear a Click:

• The card may not be pushed deep enough. Use a fingernail or a small non-metallic tool (e.g., a wooden toothpick, plastic spudger, or the edge of a credit card) to press the card slightly further.
• Avoid using sharp metal objects like needles, as they can damage the slot pins.
• If the card still won't click, remove it and check for debris inside the slot. Use compressed air gently if needed.

How to Safely Remove the SD Card:

1. Unmount the card first to prevent data corruption:
   Go to Settings → Storage → Tap "Unmount SD card" or "Eject". Wait for confirmation.
2. Push the card inward until you hear a "click" – the card will pop out partially.
3. Pull the card out gently with your fingers.

Common Troubleshooting (No Table):

• Card not detected
  Re-insert the card and ensure you hear the click. Restart the player. Test the card on a computer to confirm it works.
• "Card corrupted" error
  Insert the card into a computer, back up your data, then format it as FAT32 or exFAT.
• Card detected but files do not appear
  Ensure music files are in supported formats (MP3, FLAC, WAV, AAC, OGG, etc.). Avoid special characters in file names.
• Playback stutters or skips
  The card may be too slow. Use a UHS-I Class 10 or A1 rated card for smooth playback of high-bitrate files.
• Card sticks out after insertion
  It is not fully seated. Push again until flush with the edge. If it still sticks, the slot may be damaged.

Pro Tip: Before using a new SD card, format it on a computer as exFAT with the default allocation unit size. Then create a folder named "Music" at the root. This helps ensure optimal compatibility and faster file access.