# Read Locations locations = [] for i in range(0, 1024, 4): offset_bytes = mcr_data[i:i+3] sector_count = mcr_data[i+3] offset = int.from_bytes(offset_bytes, byteorder='big', signed=False) if offset != 0: locations.append((offset, sector_count))
If renaming doesn't work or you need to manage individual save blocks, use MemcardRex , a dedicated memory card editor. Open the file : Launch MemcardRex and go to File > Open . Select your source file. Export/Save As mcr to mcd converter
(a modern SD-card-based memory card for real hardware) and emulators like DuckStation The good news? These formats are often identical raw 1:1 data dumps of a 128KB memory card. How to Convert MCR to MCD (And Vice Versa) Method 1: The Quick Rename (Best for Simple Transfers) # Read Locations locations = [] for i