A method for migrating data to avoid read disturbance is introduced to contain the following steps: obtaining first read counts corresponding to physical blocks from a first read-count table; obtaining second read counts corresponding to the physical blocks from a second read-count table; subtracting each first read count from one corresponding second read count to generate third read counts; finding a singular physical-block from physical blocks according to the third read counts; performing a test read on data of the ith physical page of the singular physical-block; determining whether the data of the ith physical page of the singular physical block has passed the test read; and if so, moving or copying data of the ith physical page and at least one neighboring physical-page of the singular physical block to an available physical-block.