1. A method for mapping management, the steps comprising: sending data from a host; programming a host data to a non-volatile storage device; updating a mapping address to a Physical Entry to Logical (PE2L) mapping table stored in a SRAM; updating a Physical Entry (PE) status table stored in the SRAM; checking if the PE2L mapping table is full; if no, loop to the step of programming a non-volatile storage device; if yes, remove invalid entries in the PE2L mapping table and update the PE status table, and then run next step; transferring part of the PE2L mapping table to a Logical to Physical (L2P) mapping table stored in the non-volatile storage device; and programming the L2P mapping table to the non-volatile storage device and looping to the step of removing invalid entries in the PE2L mapping table and updating the PE status table.