An access device includes a memory controller coupled to a memory device and configured to access the memory device. The memory controller is further configured to perform a test procedure on the memory device to obtain a test result, write a boot code index, which indicates a predetermined address for storing predetermined system data of the memory device and a copy rule adopted for generating one or more duplicates of the predetermined system data, in the memory device, establish system data of the memory device according to the test result, write the system data into the predetermined address as the predetermined system data, and write the system data in one or more memory blocks of the memory device as the duplicates of the predetermined system data according to the copy rule.