A memory formatting method adapted to a memory storage apparatus is provided. The memory formatting method includes configuring a plurality of logical block addresses to be mapped to a portion of a plurality of physical blocks, generating a first file system data and a second file system data according to the size of the logical block addresses, and storing the first file system data into a first physical block, and the first physical block is mapped to a first logical block address among the logical block addresses. The memory formatting method also includes selecting a second physical block among the physical blocks, storing the second file system data into the second physical block, determining whether a format command is received, and when the format command is received, re-mapping the first logical block address to the second physical block.