Abstract: A memory access method is implemented in an electronic device comprising a main memory, a storage unit with a first bank and a second bank. Upon booting or resetting an electronic device, a first data set in the first bank is loaded to the main memory to be a second data set. When a first record in the second data set is modified, a corresponding record is stored to a specific address in the first bank. If the first bank does not have enough memory capacity, the corresponding record is stored in the second bank, and the first bank as well as the first record therein is erased after the storage operation. Otherwise, the first band, if having enough capacity, continues to store corresponding records.