Still the gold standard. Under the "Saves" tab for any PS2 game, you will find files uploaded by users. Note that these are often in .max (Action Replay) or .psu formats.
Method 1: Using the Built-In PCSX2 Memory Card Manager (Recommended) memory card save file for pcsx2 ps2 free
A complete virtual memory card containing multiple game saves. Still the gold standard
On a physical PlayStation 2, saves were stored on 8MB plastic memory cards. PCSX2 replicates this system using virtual memory cards, which are simple files stored on your computer’s hard drive. These files generally come in two formats: memory card save file for pcsx2 ps2 free