Reading voltage management method and storage device

A storage device, comprising:

• a connection interface unit, configured to connect to a host system;
• a memory module;
• and
• a memory controller connected to the connection interface unit and the memory module,
• wherein the memory module comprises a plurality of physical units, and the memory controller is configured to:
• select a first physical unit from the plurality of physical units;
• divide a first sub-physical unit in the first physical unit into a plurality of information windows, wherein the plurality of information windows are dedicated to storing temperature data related to a second physical unit among the plurality of physical units, the first physical unit is different from the second physical unit, and a total quantity of the plurality of information windows is same as a total quantity of a plurality of sub-physical units in the second physical unit;
• receive a read command from a host system, wherein the read command instructs to read target data from at least one logical unit, and the at least one logical unit is mapped to a second sub-physical unit in the second physical unit;
• send a first read command sequence to the memory module according to the read command to instruct the memory module to read first temperature data related to the second sub-physical unit from a first information window among the plurality of information windows;
• determine a first reading voltage level according to the first temperature data;
• and
• send a second read command sequence to the memory module based on the first reading voltage level to instruct the memory module to read the target data from the second sub-physical unit based on the first reading voltage level to respond to the read command.