Storage system according to an embodiment of the present invention, a host that provides a command; And a storage connected to the host through an interface, receiving a command from the host through the interface, calculating a standby time of the interface using an operation time of a nonvolatile memory, and providing standby time information to the host. Including a device, the host switches the interface from an active mode to a low power mode based on the wait time information. The present invention can reduce power consumption by switching an interface to a low power mode during a waiting time in an active state.
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