On a physical PlayStation 1, you needed a 128 KB memory card to save your progress. The ePSXe emulator mimics this by creating digital files in the .mcr format. : Represents Memory Card Slot 1. epsxe001.mcr : Represents Memory Card Slot 2.

In ePSXe, memory cards are stored as files in the memcards folder. By default, the emulator looks for two files: : This is Slot 1. epsxe002.mcr : This is Slot 2.