@Emrop said in Raspberry Pi4 - Retropie - Retroarch : direct access of the cores repository ?:

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And finally the cores folder is empty.

Oh, yes - that's normal. RetroPie works differently than a standalone RetroArch. Just copy your games into the corresponding systems' folder and then launch them - there's no need to start RetroArch first.

Cores are installed in their separate folders and are automatically loaded when a game is started - you don't have to run RetroArch manually. There's no need to install or update them from RetroArch - you can manage them from RetroPie-Setup.