User Block - Recommended method for storing non-file data. Factory-stored calibration constants live
in the User block for boards with analog I/O. Space here is limited to as small as (8Ksizeof(
SysIDBlock)) bytes, or less if there are calibration constants. For specific information
about the User block on your board, open the sample programs userblock_info.c and/or
idblock_report.c. The latter program will print, among other things, the location of the
User block.
You might want to consider using the battery backed SRAM