Downloading a PCSX2 BIOS (such as USA v2.30) from third-party websites is generally considered illegal because the BIOS is copyrighted software owned by Sony.
, as the BIOS is copyrighted software owned by Sony. To stay within legal and safety guidelines, the official way to obtain these files is to dump them from your own physical PlayStation 2 console How to Properly Get Your BIOS Since you are looking for a specific version like Pcsx2 Bios Usa V2.30 Download
What is PCSX2 BIOS?