All versions of CrabEmu currently store the save files for a given ROM in the same directory as the ROM. SRAM saves will be given the name {ROM Filename}.ces, where Save States will be given the name {ROM Filename}.cestate.{slot number}.
It is possible that in the future, the directory that SRAM saves and Save States will be saved into will be configurable, but this functionality is currently not in the core of CrabEmu.