What OS

So i bought a r36s v20 2025-11-10 clone with one ram. Suddenly no sound comes from the speaker so i figured I'll try some cfw but when i tried backing up the original sdcard that came with the console, the pc cant recognize the boot partition at all.

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Now im trying to install a fresh new sdcard without any files backup from the original sdcard so no original dtb and everything. What os you guys recommend?