SYSTEM AND METHOD FOR EXPANDING STORAGE SPACE OF NETWORK DEVICE

A method for expanding storage space using a network device is provided. The method sets a storage order of cloud storage space for expanding a local storage space in the network device. When target data is received from the network device, the method stores the target data into the local storage space when a size of an available storage space of the local storage space is more than or equal to a preset value. When the available storage space is less than the preset value, the method copies the earliest stored data of the local storage space into one or more specified cloud storage spaces according to the storage order, and deletes the copied data from the local storage space. The next earliest stored data is copied if the available storage space is still less than the preset value.