Non-volatile storage device and memory controller

An access control unit (108) of a memory controller (103), when page-copying data stored in a page within a copy source block of non-volatile memory (104) to a copy destination block, page-copies data stored in a page corresponding to a first copy method to a copy destination block according to a copy mode stored in a copy mode store region after performing error correction by an error correction control unit (109), page-copies data stored in a page corresponding to a second copy method to the copy destination block without performing error correction by the error correction control unit (109), and modifies the copy mode associated with the copy destination block to a copy mode different from the copy mode of the copy source block.