STORAGE DEVICE AND OPERATING METHOD THEREOF

The present disclosure relates to an electronic device. A memory controller controlling a memory package including a plurality of memory dies each including a plurality of memory blocks, the plurality of memory blocks controlled in units of super blocks each including at least one memory block selected from each of the plurality of memory dies includes a reclaim information storage storing reclaim information including read counts and migration level information related to the read counts, and a read reclaim controller migrating data stored in a target block having a read count exceeding a threshold count, and victim blocks selected according to the reclaim information for another super block different from a super block, wherein the victim blocks include memory blocks whose the migration level information is the largest among memory blocks included in memory dies different from a memory die including the target block.