System and method for expanding storage space of network device

A network device, the network device being connected to a cloud network which providing a plurality of cloud storage space, the network comprising:

• at least one processor;
• and
• a storage device storing one or more programs, when executed by the at least one processor, cause the at least one processor to perform operations of:
• setting a storage order of the plurality of cloud storage spaces for expanding a local storage space in the network device;
• receiving target data from the network device;
• determining whether a size of an available storage space of the local storage space is less than a preset value;
• and
• storing the target data into the local storage space when the size of the available storage space is more than or equal to the preset value;
• or
• copying the earliest stored data in the local storage space to one or more specified cloud storage spaces according to the storage order and deleting the copied data in the local storage space when the size of the available storage space is less than the preset value, until the size of the available storage space is great than or equal to the preset value.

A non-transitory storage medium having stored thereon instructions that, when executed by at least one processor of a network device, cause the processor to perform a method for expanding storage space using the network device, the network device being connected to a cloud network which provides a plurality of cloud storage space, the method comprising:

• setting a storage order of the plurality of cloud storage spaces for expanding a local storage space in the network device;
• receiving target data from the network device;
• determining whether a size of an available storage space of the local storage space is less than a preset value;
• and
• storing the target data into the local storage space when the size of the available storage space is more than or equal to the preset value;
• or
• copying the earliest stored data in the local storage space to one or more specified cloud storage spaces according to the storage order and deleting the copied data in the local storage space when the size of the available storage space is less than the preset value, until the size of the available storage space is great than or equal to the preset value.