To the uninitiated, it’s a random code. To the emulator, it’s an ID card. Here is the breakdown of the string:
Follow on-screen instructions. The dumper will read the BIOS chip and save it as a .bin file to your USB drive. For SCPH-70004, the file will be exactly (4,194,304 bytes). The MD5 hash should match known good dumps (available on redump.org for verification). scph70004biosv12eur200bin+top
— Accurate for its specific hardware, but with major compatibility caveats for emulation users compared to the more common Japanese/US BIOS files. To the uninitiated, it’s a random code