Connect the USB Memory Device: Insert your USB storage device into the machine's USB port.
Navigate to Home Screen: On the machine's home screen, tap the [Easy Scan] key.
Select Scan Destination: Tap [Scan to HDD/USB].
Place the Original: Place the original document in the document feeder tray of the automatic document feeder, or on the document glass.
Choose USB as Destination: Tap [Scan to USB].
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.
Select Settings: To select specific scan settings, tap the key of each desired setting.
Start Scanning: Tap the [Color Start] or [B/W Start] key to start the scanning process.
Completion: A beep will sound to indicate that scanning and file storage have ended.
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.