If you are using a very old version, saves are often located inside the installation directory.
That should lead you right to it.
Save States (instant snapshots). Installer Version: Memory Cards: C:\Users[YourUsername]\Documents\PCSX2\memcards Save States: C:\Users[YourUsername]\Documents\PCSX2\sstates Portable Version: Memory Cards: [PCSX2 Folder]\memcards Save States: [PCSX2 Folder]\sstates YouTube +1 Linux & macOS Locations Linux: Typically found in pcsx2 save file location
\PCSX2\memcards\ \PCSX2\sstates\