Storage device for managing map data in a host and operation method thereof

A memory controller comprising:

• a host interface configured to communicate with an external device;
• a memory interface configured to communicate with a memory;
• and
• a controller configured to:
• transmit a recommendation signal including information on a map data area of which activation is recommended to the external device,
• transmit map data included in a first map data area to the external device based on reception of a map data request for the first map data area from the external device,
• perform a host performance booster (HPB) read operation of reading data from the memory in response to a read request from the external device using map data stored in a plurality of map data areas of a volatile memory area of the external device,
• obtain a usage frequency for each of the plurality of map data areas, and
• store information on at least one map data area with a high usage frequency among the plurality of map data areas in a first HPB priority buffer configured as a non-volatile memory.

A storage device comprising:

• a non-volatile memory including an HPB priority buffer area;
• and
• a memory controller configured to:
• transmit a recommendation signal including information on a map data area of which activation is recommended to an external device,
• transmit map data included in a first map data area to the external device based on reception of a map data request for the first map data area from the external device,
• perform a host performance booster (HPB) read operation of reading data from the non-volatile memory in response to a read request from the external device using map data stored in a plurality of map data areas of a volatile memory area of the external device,
• obtain a usage frequency for each of the plurality of map data areas, and
• store information on at least one map data area with a high usage frequency among the plurality of map data areas in a first HPB priority buffer which is in the HPB priority buffer area.