A byte addressable storing system is provided. The byte addressable storing system includes a data transmission interface and a processing unit. The data transmission interface connects to a byte addressable storing device. The processing unit creates a primary metadata table, a secondary metadata table, an indirect metadata matching table, a sub-block using status table and a metadata pointer in the byte addressable storing device via the data transmission interface. The processing unit further adjusts the allocation of metadata in the byte addressable storing device dynamically based on the aforesaid tables and pointer. The processing unit further stores a file into sub-blocks of blocks non-sequentially, and achieves record of the file via dynamic multi-level pointing.