Memory storage device and operating method thereof

A memory storage device comprising:

• a plurality of memory devices, each comprising a page temporary storage area and a storage area;
• and
• a controller comprising a buffer area,
• wherein the controller is suitable for performing:
• a write request step in which the controller receives a write request instruction of one memory device among the plurality of memory devices, and stores write data in the buffer area, according to the write request instruction;
• a read request step in which the controller receives a read request instruction of the one memory device among the plurality of memory devices, and transmits data which are intended to be read from the storage area of the one memory device, to the buffer area, according to the read request instruction;
• a page temporary storage area write step in which the controller performs a page temporary storage area write instruction, and transmits the data temporarily stored in the buffer area to the page temporary storage area of the one memory device;
• a repeating step in which the controller switches over to another memory device among the plurality of memory devices, and repeats the write request step, the read request step, and the page temporary storage area write step until the respective memory devices complete the write request step, the read request step, and the page temporary storage area write step;
• and
• a page temporary storage area programming step in which the controller performs a page temporary storage area programming instruction, and writes data of the page temporary storage areas of the respective memory devices to the storage areas of the respective memory devices,
• wherein before the page temporary storage area programming step is performed, the data transmitted to the page temporary storage areas of the respective memory devices are temporarily stored in the page temporary storage areas.