emulator_settings.xml

<?xml version="1.0" encoding="UTF-8"?>
<emulators>
    <emulator>
        <name>lr-ppsspp</name>
        <saveFileExtensions>
            <ext>SYS</ext>
            <ext>PNG</ext>
            <ext>SFO</ext>
            <ext>state</ext>
        </saveFileExtensions>
    </emulator>
    <emulator>
        <name>ppsspp</name>
        <saveFilePath>/opt/retropie/configs/psp/</saveFilePath>
        <saveStatePath>/opt/retropie/configs/psp/PSP/PPSSPP_STATE</saveFilePath>
        <saveFileExtensions>
            <ext>SYS</ext>
            <ext>PNG</ext>
            <ext>SFO</ext>
            <ext>state</ext>
        </saveFileExtensions>
    </emulator>
</emulators>