A semiconductor memory information storage apparatus includes a storage unit using a nonvolatile memory, a write number manager counting each of numbers of times of writing of all blocks, a list manager classifying the blocks in the nonvolatile memory by in-use/unused, managing in an in-use list a block of the in-use, managing in a first unused list a block with the number of times of writing equal to a maximum value, and managing in a second unused list a block with the number of times of writing less than the maximum value, and a controller writing and erasing information data to and from the storage unit.