1. A storage device comprising: a control unit that performs processing for communication with a host device; a storage unit to which write data included in a write data packet that is transmitted from the host device is to be written; and a storage control unit that performs access control on the storage unit, wherein the control unit receives the write data packet from the host device, in a case where a data pattern constituted by the write data and additional data that are included in the write data packet is judged as not matching a specific pattern, along with making an update instruction of address information, makes a write instruction regarding the write data to the storage control unit, and in a case where the data pattern constituted by the write data and the additional data is judged as matching the specific pattern, does not make a write instruction regarding the write data, but makes an update instruction of the address information to the storage control unit.