In accordance with an embodiment of the present disclosure, a method of a controller for controlling a nonvolatile memory device including a plurality of data storage regions may include: determining, in response to a first copy event of receiving from a host a command instructing copy of data from a first logical address into a second logical address, whether a second copy event of copying the data from a first data storage region having a first physical address mapped to the first logical address into a data storage region having another physical address will occur; and in response to determining that the second copy event will not occur, changing a logical address mapped to the first physical address from the first logical address to the second logical address and invalidating the first logical address.