You will see files like Mcd001.ps2 (Slot 1) and Mcd002.ps2 (Slot 2).
If you downloaded a compressed save file (commonly from GameFAQs), you need to convert it. tekken 5 save game pcsx2 20 hot
: A classic resource for PCSX2-compatible memory card files (.ps2) or cheat patches (.pnach). How to Install a Save Game on PCSX2 Download the File You will see files like Mcd001