The GW101 gateway provides a Micro SD card interface on its side, using a standard MicroSD card socket, with "Micro SD" silkscreened on the housing. When installing, the card's notch should face inward and be on the right side of the housing opening. The Micro SD card must be purchased separately and is not included with the product. The Micro SD card can be used for system debugging or system upgrades. After the system has finished booting, users can read from and write to the SD card, allowing user data to be flexibly stored on the Micro SD memory card.