This disclosure provides a memory
system and its operation method, as well as a computer-readable storage medium. The memory
system includes a memory, the
physical space of which is divided into a
user space and a hidden space; a
memory controller coupled to the memory, and the
memory controller is configured to: set a first storage block in the
user space as a write acceleration cache; wherein the first storage block is a first-level
storage cell mode; the write acceleration cache is configured to cache data; and set a free storage block in the hidden space as a write acceleration cache; wherein the free storage block is a first-level
storage cell mode.