The PlayStation 1 (PSX) era introduced the standard of external memory cards for game saves. When emulating these games on modern hardware via ePSXe (enhanced PSX emulator), the physical memory card is replaced by a virtual file. Among the various file types generated by the emulator, epsxe000mcr is perhaps the most critical, representing the primary virtual memory card. Users often search for this term in conjunction with "free" when seeking tools to convert, repair, or extract data from these files without cost.
Since ePSXe does not have a built-in memory card editor, you can manage your saves using these methods: BIOS Editor File > Run BIOS epsxe000mcr free