A method for managing storage resources includes calculating ratios of the quantity of data accessed to the current data occupation of storage unit of each server in a network. The method determines one or more servers each with ratio greater than a first preset value, and determines one or more servers each with ratio less than a second preset value. Next, the method outputs signals to control the servers with ratios each greater than the first preset value to transfer data to the one or more servers with ratios each less than the second preset value, until the ratios of all servers is less than or equal to the first preset value and greater than or equal to the second preset value. A related device for applying the method and a related non-transitory storage medium are also provided.