This is the "Save RAM" format used by RetroArch and its various Libretro cores (like Beetle PSX or PCSX-ReArmed).
Because both formats are typically raw data, you can often "convert" them simply by changing the file extension. Locate your .mcr file (e.g., FinalFantasyVII.mcr ). mcr to srm converter
If a simple rename doesn't work—which can happen if the file has a header or is part of a multi-save card— MemcardRex is the gold standard for managing these files. This is the "Save RAM" format used by