Data storage device and data management method thereof

PURPOSE: A data storage device and a data management method thereof are provided to efficiently manage a ware level by allocating page data having a high frequency of update to a block having a low erase count. CONSTITUTION: A memory controller(2100) refers to an allocation sequence of a first memory block allocated for writing data in order to allocate page data included in the first memory block to a second memory block or a third memory block having a higher erase count value than the erase count value of the second memory block. If the allocation sequence of the first memory block is greater than a reference value, the page data is allocated to the second memory block. If the allocation sequence of the first memory block is smaller than a reference value, the page data is allocated to the third memory block.