PC: You can usually just browse and select the Sonic_Knuckles_wSonic3.bin file from your storage. sonicknuckleswsonic3bin file

Chapter 1: What Exactly Is "sonicknuckleswsonic3.bin"?

1.1 The Naming Convention

The file name breaks down into three distinct parts: The Sonic_Knuckles_wSonic3

The file sonicknuckleswsonic3bin is a digital simulation of that physical combination. It is a single file containing the data from both cartridges merged together, allowing the player to experience the complete saga intended by the developers. It is a single file containing the data

Technical background

CRC/MD5 Verification: If you are verifying if your file is a "good dump" (a perfect copy of the game), emulator databases often look for specific checksums. The most common "good" ROM of the combined game usually follows the S3K.bin naming convention in modern sets, but legacy sets often use the longer "sonicknuckleswsonic3bin" style naming.