A storage device having an improved operation speed includes a memory device and a memory controller for controlling the memory device. The memory controller includes: a Device-To-Host (DTH) information generator configured to generate DTH information to be transferred to a host, a host memory accessor configured to provide the host with the DTH information received from the DTH information generator and an interrupt signal generator configured to output, to the host, an interrupt signal notifying that the DTH information has been provided to the host, based on a request from the host memory accessor.