Method of accessing data in storage device, method of managing data in storage device and storage device performing the same

A storage device comprising:

• a first nonvolatile memory;
• a second nonvolatile memory, the first nonvolatile memory and the second nonvolatile memory being different types of memories;
• a controller configured to control an operation of the first nonvolatile memory and the second nonvolatile memory, to set a meta data attribute table by classifying a plurality of meta data based on a plurality of data attributes and accessible memory types, to detect a data attribute of first meta data among the plurality of meta data based on the meta data attribute table in response to receiving a first access request for the first meta data, to determine a target memory optimized for the first meta data from among the first and second nonvolatile memories based on the detected data attribute of the first meta data, and to perform an access operation on the target memory based on the first meta data, the plurality of meta data being used for controlling an operation of the storage device.

21-23. (canceled)