@zing You're totally right. Using a newer and faster MicroSD and works like a charm.

Thanks! Now I can use Recalbox on my RPi 3B+ and in my OGA and trasnfer the .srm files between them.

I downloaded the latest version of Recalbox (7.2.2-Reloaded) for my OGA v2 and when the welcome says 'press any button' is stucked, I pressed all the buttons from my OGA and nothing happens. My OGA is OK (I have another SD with EmuELEC and it's working just fine). Below you can find a short video.

https://imgur.com/2NFQ2fE