mcd001.ps2
For those who may not know, PCSX2 is a popular emulator for playing PlayStation 2 (PS2) games on PC. The file you're referring to, mcd001.ps2 , is a memory card file used by PCSX2 to store save data for PS2 games.
There you have it! A brief but detailed look at the mcd001.ps2 file used by PCSX2 to store save data for WWE SmackDown: Here Comes the Pain.
When using PCSX2, each game requires its own memory card file to store save data. The mcd001.ps2 file is a memory card file specifically designed for WWE SmackDown: Here Comes the Pain.