Memory system for performing a different program operation based on a size of data and an operating method thereof

A method for operating a memory system with a controller and a memory device including a plurality of dies, the method comprising:

• temporarily storing target data into a plurality of entries included in a buffer;
• storing a start entry and an end entry in which the target data is stored, among the plurality of entries;
• comparing a size of the target data with a predetermined threshold value;
• determining a skip value based on physical information of the memory device when the size of the target data is equal to or greater than a predetermined threshold value;
• and
• programming the target data through a interleaving programming method based on the start entry, the end entry, and the skip value.

A memory system comprising:

• a memory device including a plurality of dies;
• and
• a controller suitable for controlling the memory device,
• wherein the controller includes:
• a plurality of entries suitable for temporarily storing target data to be programmed into the plurality of dies of the memory device;
• a monitor suitable for determining a size of the target data;
• a buffer manager suitable for storing a start entry and an end entry in which the target data is stored;
• and
• a processor suitable for controlling the memory device to perform a program operation on the target data through an interleaving programming method or a sequential programming method based on the start entry, the end entry.