Disclosed is a method of copying data between open-channel solid state drives (SSDs), the method including transmitting, by a host, a read command to a source SSD, performing, by the source SSD, a read operation on data stored in the source SSD, in response to the read command, specifying, by the source SSD, an address of a data buffer of a destination SSD, in response to the read command, copying, by the source SSD, the stored data to the specified address of the data buffer, and storing, by the destination SSD, the data copied from the source SSD.