Please follow the steps and precautions below to ensure optimum function:
1. Please insert the external storage device into the card reader, and then connect the reader to the smartphone/tablet.
2. To change the storage device, please remove the card reader first; change the storage device and then reconnect the card reader to the smartphone/tablet.
3. The reader does not support simultaneous insertion of two cards.
4. When data transfer is in progress, please do not remove other storage devices on the reader.