A data transfer method is provided for a terminal coupled to a server by one or more networks. The method includes detecting a connection type of a current network between the terminal and the server and performing data transfer between the terminal and the server when it is detected that the connection type of the current network is a wireless fidelity (WiFi) connection. Further, the method includes suspending data transfer between the terminal and the server when it is detected that the connection type of the current network is a non-WiFi connection.