A memory device comprising: a plurality of storage units configured to store data; and at least one device controller configured to, receive a read command (HPB READ) from at least one host device and to read data stored in the plurality of storage units in response to the read command (HPB READ), the at least one host device including at least one host memory including a plurality of HPB, high performance boosting, entry storage regions (RG), and provide the at least one host device with a response command, the response command (RSP) indicating an activation or deactivation of the plurality of HPB entry storage regions (RG), the response command (RSP) including HPB entry type information (HPBETI) which indicates a HPB entry type of the HPB entry storage region (RG), characterized in that the plurality of HPB entry storage regions (RG) includes at least a first HPB entry storage region corresponding to a first HPB entry type (HPB entry 1) and a second HPB entry storage region corresponding to a second HPB entry type (HPB entry 2); a first value of the HPB entry type information (HPBETI) indicates the first HPB entry type (HPB entry 1); a second value of the HPB entry type information (HPBETI) indicates the second HPB entry type (HPB entry 2); and a third value of the HPB entry type information (HPBETI) indicates both the first HPB entry type (HPB entry 1) and the second HPB entry type (HPB entry 2). a plurality of storage units configured to store data; and at least one device controller configured to, receive a read command (HPB READ) from at least one host device and to read data stored in the plurality of storage units in response to the read command (HPB READ), the at least one host device including at least one host memory including a plurality of HPB, high performance boosting, entry storage regions (RG), and provide the at least one host device with a response command, the response command (RSP) indicating an activation or deactivation of the plurality of HPB entry storage regions (RG), the response command (RSP) including HPB entry type information (HPBETI) which indicates a HPB entry type of the HPB entry storage region (RG), receive a read command (HPB READ) from at least one host device and to read data stored in the plurality of storage units in response to the read command (HPB READ), the at least one host device including at least one host memory including a plurality of HPB, high performance boosting, entry storage regions (RG), and provide the at least one host device with a response command, the response command (RSP) indicating an activation or deactivation of the plurality of HPB entry storage regions (RG), the response command (RSP) including HPB entry type information (HPBETI) which indicates a HPB entry type of the HPB entry storage region (RG), characterized in that the plurality of HPB entry storage regions (RG) includes at least a first HPB entry storage region corresponding to a first HPB entry type (HPB entry 1) and a second HPB entry storage region corresponding to a second HPB entry type (HPB entry 2); a first value of the HPB entry type information (HPBETI) indicates the first HPB entry type (HPB entry 1); a second value of the HPB entry type information (HPBETI) indicates the second HPB entry type (HPB entry 2); and a third value of the HPB entry type information (HPBETI) indicates both the first HPB entry type (HPB entry 1) and the second HPB entry type (HPB entry 2). <EOS>