Steps for Scanning to USB Storage Device:

1. Connect the USB Memory Device: Insert your USB storage device into the machine's USB port.

2. Navigate to Home Screen: On the machine's home screen, tap the [Easy Scan] key.

3. Select Scan Destination: Tap [Scan to HDD/USB].

4. Place the Original: Place the original document in the document feeder tray of the automatic document feeder, or on the document glass.

5. Choose USB as Destination: Tap [Scan to USB].

6. Auto Set (Optional): If you are using models like MX-3071/MX-3571/MX-4071, or if the OCR expansion kit is installed on your machine, you can tap the [Auto Set] key to automatically set the read settings to match the original.

7. Select Settings: To select specific scan settings, tap the key of each desired setting.

8. Start Scanning: Tap the [Color Start] or [B/W Start] key to start the scanning process.

9. Completion: A beep will sound to indicate that scanning and file storage have ended.

10. Remove USB: Check the [Sending data has been completed.] message, and then remove the USB memory device from the machine.

For more detailed instructions, you can refer to the official user manual.