Specifically, the MCR file is a that stores:

However, for direct GME → MCR (Minecraft region/world or mod source). The two engines are fundamentally different:

How Does a GME to MCR Converter Work? A Deep Dive into Retro Save File Conversion

. Since the underlying game data in a GME file is identical to that in an MCR file, the converter simply removes the DexDrive-specific header information and saves the remaining 128KB of raw data. While simple in theory, advanced tools also handle: Single-Save Extraction:

Do you prefer using a or a downloadable desktop program?

The process also works in reverse. If you have a save on your PC in an emulator's .mcr format that you want to transfer back to a physical memory card using a DexDrive, the same tools can open the .mcr file and a .gme to complete the journey.